1 2 #include <linux/ceph/ceph_debug.h> 3 4 #include <linux/module.h> 5 #include <linux/err.h> 6 #include <linux/highmem.h> 7 #include <linux/mm.h> 8 #include <linux/pagemap.h> 9 #include <linux/slab.h> 10 #include <linux/uaccess.h> 11 #ifdef CONFIG_BLOCK 12 #include <linux/bio.h> 13 #endif 14 15 #include <linux/ceph/ceph_features.h> 16 #include <linux/ceph/libceph.h> 17 #include <linux/ceph/osd_client.h> 18 #include <linux/ceph/messenger.h> 19 #include <linux/ceph/decode.h> 20 #include <linux/ceph/auth.h> 21 #include <linux/ceph/pagelist.h> 22 23 #define OSD_OPREPLY_FRONT_LEN 512 24 25 static struct kmem_cache *ceph_osd_request_cache; 26 27 static const struct ceph_connection_operations osd_con_ops; 28 29 /* 30 * Implement client access to distributed object storage cluster. 31 * 32 * All data objects are stored within a cluster/cloud of OSDs, or 33 * "object storage devices." (Note that Ceph OSDs have _nothing_ to 34 * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply 35 * remote daemons serving up and coordinating consistent and safe 36 * access to storage. 37 * 38 * Cluster membership and the mapping of data objects onto storage devices 39 * are described by the osd map. 40 * 41 * We keep track of pending OSD requests (read, write), resubmit 42 * requests to different OSDs when the cluster topology/data layout 43 * change, or retry the affected requests when the communications 44 * channel with an OSD is reset. 45 */ 46 47 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req); 48 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req); 49 static void link_linger(struct ceph_osd *osd, 50 struct ceph_osd_linger_request *lreq); 51 static void unlink_linger(struct ceph_osd *osd, 52 struct ceph_osd_linger_request *lreq); 53 static void clear_backoffs(struct ceph_osd *osd); 54 55 #if 1 56 static inline bool rwsem_is_wrlocked(struct rw_semaphore *sem) 57 { 58 bool wrlocked = true; 59 60 if (unlikely(down_read_trylock(sem))) { 61 wrlocked = false; 62 up_read(sem); 63 } 64 65 return wrlocked; 66 } 67 static inline void verify_osdc_locked(struct ceph_osd_client *osdc) 68 { 69 WARN_ON(!rwsem_is_locked(&osdc->lock)); 70 } 71 static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc) 72 { 73 WARN_ON(!rwsem_is_wrlocked(&osdc->lock)); 74 } 75 static inline void verify_osd_locked(struct ceph_osd *osd) 76 { 77 struct ceph_osd_client *osdc = osd->o_osdc; 78 79 WARN_ON(!(mutex_is_locked(&osd->lock) && 80 rwsem_is_locked(&osdc->lock)) && 81 !rwsem_is_wrlocked(&osdc->lock)); 82 } 83 static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) 84 { 85 WARN_ON(!mutex_is_locked(&lreq->lock)); 86 } 87 #else 88 static inline void verify_osdc_locked(struct ceph_osd_client *osdc) { } 89 static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc) { } 90 static inline void verify_osd_locked(struct ceph_osd *osd) { } 91 static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) { } 92 #endif 93 94 /* 95 * calculate the mapping of a file extent onto an object, and fill out the 96 * request accordingly. shorten extent as necessary if it crosses an 97 * object boundary. 98 * 99 * fill osd op in request message. 100 */ 101 static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen, 102 u64 *objnum, u64 *objoff, u64 *objlen) 103 { 104 u64 orig_len = *plen; 105 int r; 106 107 /* object extent? */ 108 r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum, 109 objoff, objlen); 110 if (r < 0) 111 return r; 112 if (*objlen < orig_len) { 113 *plen = *objlen; 114 dout(" skipping last %llu, final file extent %llu~%llu\n", 115 orig_len - *plen, off, *plen); 116 } 117 118 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen); 119 120 return 0; 121 } 122 123 static void ceph_osd_data_init(struct ceph_osd_data *osd_data) 124 { 125 memset(osd_data, 0, sizeof (*osd_data)); 126 osd_data->type = CEPH_OSD_DATA_TYPE_NONE; 127 } 128 129 static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data, 130 struct page **pages, u64 length, u32 alignment, 131 bool pages_from_pool, bool own_pages) 132 { 133 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES; 134 osd_data->pages = pages; 135 osd_data->length = length; 136 osd_data->alignment = alignment; 137 osd_data->pages_from_pool = pages_from_pool; 138 osd_data->own_pages = own_pages; 139 } 140 141 static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data, 142 struct ceph_pagelist *pagelist) 143 { 144 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST; 145 osd_data->pagelist = pagelist; 146 } 147 148 #ifdef CONFIG_BLOCK 149 static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data, 150 struct bio *bio, size_t bio_length) 151 { 152 osd_data->type = CEPH_OSD_DATA_TYPE_BIO; 153 osd_data->bio = bio; 154 osd_data->bio_length = bio_length; 155 } 156 #endif /* CONFIG_BLOCK */ 157 158 #define osd_req_op_data(oreq, whch, typ, fld) \ 159 ({ \ 160 struct ceph_osd_request *__oreq = (oreq); \ 161 unsigned int __whch = (whch); \ 162 BUG_ON(__whch >= __oreq->r_num_ops); \ 163 &__oreq->r_ops[__whch].typ.fld; \ 164 }) 165 166 static struct ceph_osd_data * 167 osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which) 168 { 169 BUG_ON(which >= osd_req->r_num_ops); 170 171 return &osd_req->r_ops[which].raw_data_in; 172 } 173 174 struct ceph_osd_data * 175 osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req, 176 unsigned int which) 177 { 178 return osd_req_op_data(osd_req, which, extent, osd_data); 179 } 180 EXPORT_SYMBOL(osd_req_op_extent_osd_data); 181 182 void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req, 183 unsigned int which, struct page **pages, 184 u64 length, u32 alignment, 185 bool pages_from_pool, bool own_pages) 186 { 187 struct ceph_osd_data *osd_data; 188 189 osd_data = osd_req_op_raw_data_in(osd_req, which); 190 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 191 pages_from_pool, own_pages); 192 } 193 EXPORT_SYMBOL(osd_req_op_raw_data_in_pages); 194 195 void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req, 196 unsigned int which, struct page **pages, 197 u64 length, u32 alignment, 198 bool pages_from_pool, bool own_pages) 199 { 200 struct ceph_osd_data *osd_data; 201 202 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 203 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 204 pages_from_pool, own_pages); 205 } 206 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages); 207 208 void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req, 209 unsigned int which, struct ceph_pagelist *pagelist) 210 { 211 struct ceph_osd_data *osd_data; 212 213 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 214 ceph_osd_data_pagelist_init(osd_data, pagelist); 215 } 216 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist); 217 218 #ifdef CONFIG_BLOCK 219 void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req, 220 unsigned int which, struct bio *bio, size_t bio_length) 221 { 222 struct ceph_osd_data *osd_data; 223 224 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 225 ceph_osd_data_bio_init(osd_data, bio, bio_length); 226 } 227 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio); 228 #endif /* CONFIG_BLOCK */ 229 230 static void osd_req_op_cls_request_info_pagelist( 231 struct ceph_osd_request *osd_req, 232 unsigned int which, struct ceph_pagelist *pagelist) 233 { 234 struct ceph_osd_data *osd_data; 235 236 osd_data = osd_req_op_data(osd_req, which, cls, request_info); 237 ceph_osd_data_pagelist_init(osd_data, pagelist); 238 } 239 240 void osd_req_op_cls_request_data_pagelist( 241 struct ceph_osd_request *osd_req, 242 unsigned int which, struct ceph_pagelist *pagelist) 243 { 244 struct ceph_osd_data *osd_data; 245 246 osd_data = osd_req_op_data(osd_req, which, cls, request_data); 247 ceph_osd_data_pagelist_init(osd_data, pagelist); 248 osd_req->r_ops[which].cls.indata_len += pagelist->length; 249 osd_req->r_ops[which].indata_len += pagelist->length; 250 } 251 EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist); 252 253 void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req, 254 unsigned int which, struct page **pages, u64 length, 255 u32 alignment, bool pages_from_pool, bool own_pages) 256 { 257 struct ceph_osd_data *osd_data; 258 259 osd_data = osd_req_op_data(osd_req, which, cls, request_data); 260 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 261 pages_from_pool, own_pages); 262 osd_req->r_ops[which].cls.indata_len += length; 263 osd_req->r_ops[which].indata_len += length; 264 } 265 EXPORT_SYMBOL(osd_req_op_cls_request_data_pages); 266 267 void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req, 268 unsigned int which, struct page **pages, u64 length, 269 u32 alignment, bool pages_from_pool, bool own_pages) 270 { 271 struct ceph_osd_data *osd_data; 272 273 osd_data = osd_req_op_data(osd_req, which, cls, response_data); 274 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 275 pages_from_pool, own_pages); 276 } 277 EXPORT_SYMBOL(osd_req_op_cls_response_data_pages); 278 279 static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data) 280 { 281 switch (osd_data->type) { 282 case CEPH_OSD_DATA_TYPE_NONE: 283 return 0; 284 case CEPH_OSD_DATA_TYPE_PAGES: 285 return osd_data->length; 286 case CEPH_OSD_DATA_TYPE_PAGELIST: 287 return (u64)osd_data->pagelist->length; 288 #ifdef CONFIG_BLOCK 289 case CEPH_OSD_DATA_TYPE_BIO: 290 return (u64)osd_data->bio_length; 291 #endif /* CONFIG_BLOCK */ 292 default: 293 WARN(true, "unrecognized data type %d\n", (int)osd_data->type); 294 return 0; 295 } 296 } 297 298 static void ceph_osd_data_release(struct ceph_osd_data *osd_data) 299 { 300 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) { 301 int num_pages; 302 303 num_pages = calc_pages_for((u64)osd_data->alignment, 304 (u64)osd_data->length); 305 ceph_release_page_vector(osd_data->pages, num_pages); 306 } 307 ceph_osd_data_init(osd_data); 308 } 309 310 static void osd_req_op_data_release(struct ceph_osd_request *osd_req, 311 unsigned int which) 312 { 313 struct ceph_osd_req_op *op; 314 315 BUG_ON(which >= osd_req->r_num_ops); 316 op = &osd_req->r_ops[which]; 317 318 switch (op->op) { 319 case CEPH_OSD_OP_READ: 320 case CEPH_OSD_OP_WRITE: 321 case CEPH_OSD_OP_WRITEFULL: 322 ceph_osd_data_release(&op->extent.osd_data); 323 break; 324 case CEPH_OSD_OP_CALL: 325 ceph_osd_data_release(&op->cls.request_info); 326 ceph_osd_data_release(&op->cls.request_data); 327 ceph_osd_data_release(&op->cls.response_data); 328 break; 329 case CEPH_OSD_OP_SETXATTR: 330 case CEPH_OSD_OP_CMPXATTR: 331 ceph_osd_data_release(&op->xattr.osd_data); 332 break; 333 case CEPH_OSD_OP_STAT: 334 ceph_osd_data_release(&op->raw_data_in); 335 break; 336 case CEPH_OSD_OP_NOTIFY_ACK: 337 ceph_osd_data_release(&op->notify_ack.request_data); 338 break; 339 case CEPH_OSD_OP_NOTIFY: 340 ceph_osd_data_release(&op->notify.request_data); 341 ceph_osd_data_release(&op->notify.response_data); 342 break; 343 case CEPH_OSD_OP_LIST_WATCHERS: 344 ceph_osd_data_release(&op->list_watchers.response_data); 345 break; 346 default: 347 break; 348 } 349 } 350 351 /* 352 * Assumes @t is zero-initialized. 353 */ 354 static void target_init(struct ceph_osd_request_target *t) 355 { 356 ceph_oid_init(&t->base_oid); 357 ceph_oloc_init(&t->base_oloc); 358 ceph_oid_init(&t->target_oid); 359 ceph_oloc_init(&t->target_oloc); 360 361 ceph_osds_init(&t->acting); 362 ceph_osds_init(&t->up); 363 t->size = -1; 364 t->min_size = -1; 365 366 t->osd = CEPH_HOMELESS_OSD; 367 } 368 369 static void target_copy(struct ceph_osd_request_target *dest, 370 const struct ceph_osd_request_target *src) 371 { 372 ceph_oid_copy(&dest->base_oid, &src->base_oid); 373 ceph_oloc_copy(&dest->base_oloc, &src->base_oloc); 374 ceph_oid_copy(&dest->target_oid, &src->target_oid); 375 ceph_oloc_copy(&dest->target_oloc, &src->target_oloc); 376 377 dest->pgid = src->pgid; /* struct */ 378 dest->spgid = src->spgid; /* struct */ 379 dest->pg_num = src->pg_num; 380 dest->pg_num_mask = src->pg_num_mask; 381 ceph_osds_copy(&dest->acting, &src->acting); 382 ceph_osds_copy(&dest->up, &src->up); 383 dest->size = src->size; 384 dest->min_size = src->min_size; 385 dest->sort_bitwise = src->sort_bitwise; 386 387 dest->flags = src->flags; 388 dest->paused = src->paused; 389 390 dest->epoch = src->epoch; 391 dest->last_force_resend = src->last_force_resend; 392 393 dest->osd = src->osd; 394 } 395 396 static void target_destroy(struct ceph_osd_request_target *t) 397 { 398 ceph_oid_destroy(&t->base_oid); 399 ceph_oloc_destroy(&t->base_oloc); 400 ceph_oid_destroy(&t->target_oid); 401 ceph_oloc_destroy(&t->target_oloc); 402 } 403 404 /* 405 * requests 406 */ 407 static void request_release_checks(struct ceph_osd_request *req) 408 { 409 WARN_ON(!RB_EMPTY_NODE(&req->r_node)); 410 WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node)); 411 WARN_ON(!list_empty(&req->r_unsafe_item)); 412 WARN_ON(req->r_osd); 413 } 414 415 static void ceph_osdc_release_request(struct kref *kref) 416 { 417 struct ceph_osd_request *req = container_of(kref, 418 struct ceph_osd_request, r_kref); 419 unsigned int which; 420 421 dout("%s %p (r_request %p r_reply %p)\n", __func__, req, 422 req->r_request, req->r_reply); 423 request_release_checks(req); 424 425 if (req->r_request) 426 ceph_msg_put(req->r_request); 427 if (req->r_reply) 428 ceph_msg_put(req->r_reply); 429 430 for (which = 0; which < req->r_num_ops; which++) 431 osd_req_op_data_release(req, which); 432 433 target_destroy(&req->r_t); 434 ceph_put_snap_context(req->r_snapc); 435 436 if (req->r_mempool) 437 mempool_free(req, req->r_osdc->req_mempool); 438 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS) 439 kmem_cache_free(ceph_osd_request_cache, req); 440 else 441 kfree(req); 442 } 443 444 void ceph_osdc_get_request(struct ceph_osd_request *req) 445 { 446 dout("%s %p (was %d)\n", __func__, req, 447 kref_read(&req->r_kref)); 448 kref_get(&req->r_kref); 449 } 450 EXPORT_SYMBOL(ceph_osdc_get_request); 451 452 void ceph_osdc_put_request(struct ceph_osd_request *req) 453 { 454 if (req) { 455 dout("%s %p (was %d)\n", __func__, req, 456 kref_read(&req->r_kref)); 457 kref_put(&req->r_kref, ceph_osdc_release_request); 458 } 459 } 460 EXPORT_SYMBOL(ceph_osdc_put_request); 461 462 static void request_init(struct ceph_osd_request *req) 463 { 464 /* req only, each op is zeroed in _osd_req_op_init() */ 465 memset(req, 0, sizeof(*req)); 466 467 kref_init(&req->r_kref); 468 init_completion(&req->r_completion); 469 RB_CLEAR_NODE(&req->r_node); 470 RB_CLEAR_NODE(&req->r_mc_node); 471 INIT_LIST_HEAD(&req->r_unsafe_item); 472 473 target_init(&req->r_t); 474 } 475 476 /* 477 * This is ugly, but it allows us to reuse linger registration and ping 478 * requests, keeping the structure of the code around send_linger{_ping}() 479 * reasonable. Setting up a min_nr=2 mempool for each linger request 480 * and dealing with copying ops (this blasts req only, watch op remains 481 * intact) isn't any better. 482 */ 483 static void request_reinit(struct ceph_osd_request *req) 484 { 485 struct ceph_osd_client *osdc = req->r_osdc; 486 bool mempool = req->r_mempool; 487 unsigned int num_ops = req->r_num_ops; 488 u64 snapid = req->r_snapid; 489 struct ceph_snap_context *snapc = req->r_snapc; 490 bool linger = req->r_linger; 491 struct ceph_msg *request_msg = req->r_request; 492 struct ceph_msg *reply_msg = req->r_reply; 493 494 dout("%s req %p\n", __func__, req); 495 WARN_ON(kref_read(&req->r_kref) != 1); 496 request_release_checks(req); 497 498 WARN_ON(kref_read(&request_msg->kref) != 1); 499 WARN_ON(kref_read(&reply_msg->kref) != 1); 500 target_destroy(&req->r_t); 501 502 request_init(req); 503 req->r_osdc = osdc; 504 req->r_mempool = mempool; 505 req->r_num_ops = num_ops; 506 req->r_snapid = snapid; 507 req->r_snapc = snapc; 508 req->r_linger = linger; 509 req->r_request = request_msg; 510 req->r_reply = reply_msg; 511 } 512 513 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, 514 struct ceph_snap_context *snapc, 515 unsigned int num_ops, 516 bool use_mempool, 517 gfp_t gfp_flags) 518 { 519 struct ceph_osd_request *req; 520 521 if (use_mempool) { 522 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS); 523 req = mempool_alloc(osdc->req_mempool, gfp_flags); 524 } else if (num_ops <= CEPH_OSD_SLAB_OPS) { 525 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags); 526 } else { 527 BUG_ON(num_ops > CEPH_OSD_MAX_OPS); 528 req = kmalloc(sizeof(*req) + num_ops * sizeof(req->r_ops[0]), 529 gfp_flags); 530 } 531 if (unlikely(!req)) 532 return NULL; 533 534 request_init(req); 535 req->r_osdc = osdc; 536 req->r_mempool = use_mempool; 537 req->r_num_ops = num_ops; 538 req->r_snapid = CEPH_NOSNAP; 539 req->r_snapc = ceph_get_snap_context(snapc); 540 541 dout("%s req %p\n", __func__, req); 542 return req; 543 } 544 EXPORT_SYMBOL(ceph_osdc_alloc_request); 545 546 static int ceph_oloc_encoding_size(const struct ceph_object_locator *oloc) 547 { 548 return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0); 549 } 550 551 int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp) 552 { 553 struct ceph_osd_client *osdc = req->r_osdc; 554 struct ceph_msg *msg; 555 int msg_size; 556 557 WARN_ON(ceph_oid_empty(&req->r_base_oid)); 558 WARN_ON(ceph_oloc_empty(&req->r_base_oloc)); 559 560 /* create request message */ 561 msg_size = CEPH_ENCODING_START_BLK_LEN + 562 CEPH_PGID_ENCODING_LEN + 1; /* spgid */ 563 msg_size += 4 + 4 + 4; /* hash, osdmap_epoch, flags */ 564 msg_size += CEPH_ENCODING_START_BLK_LEN + 565 sizeof(struct ceph_osd_reqid); /* reqid */ 566 msg_size += sizeof(struct ceph_blkin_trace_info); /* trace */ 567 msg_size += 4 + sizeof(struct ceph_timespec); /* client_inc, mtime */ 568 msg_size += CEPH_ENCODING_START_BLK_LEN + 569 ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */ 570 msg_size += 4 + req->r_base_oid.name_len; /* oid */ 571 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op); 572 msg_size += 8; /* snapid */ 573 msg_size += 8; /* snap_seq */ 574 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0); 575 msg_size += 4 + 8; /* retry_attempt, features */ 576 577 if (req->r_mempool) 578 msg = ceph_msgpool_get(&osdc->msgpool_op, 0); 579 else 580 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp, true); 581 if (!msg) 582 return -ENOMEM; 583 584 memset(msg->front.iov_base, 0, msg->front.iov_len); 585 req->r_request = msg; 586 587 /* create reply message */ 588 msg_size = OSD_OPREPLY_FRONT_LEN; 589 msg_size += req->r_base_oid.name_len; 590 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op); 591 592 if (req->r_mempool) 593 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0); 594 else 595 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, msg_size, gfp, true); 596 if (!msg) 597 return -ENOMEM; 598 599 req->r_reply = msg; 600 601 return 0; 602 } 603 EXPORT_SYMBOL(ceph_osdc_alloc_messages); 604 605 static bool osd_req_opcode_valid(u16 opcode) 606 { 607 switch (opcode) { 608 #define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true; 609 __CEPH_FORALL_OSD_OPS(GENERATE_CASE) 610 #undef GENERATE_CASE 611 default: 612 return false; 613 } 614 } 615 616 /* 617 * This is an osd op init function for opcodes that have no data or 618 * other information associated with them. It also serves as a 619 * common init routine for all the other init functions, below. 620 */ 621 static struct ceph_osd_req_op * 622 _osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which, 623 u16 opcode, u32 flags) 624 { 625 struct ceph_osd_req_op *op; 626 627 BUG_ON(which >= osd_req->r_num_ops); 628 BUG_ON(!osd_req_opcode_valid(opcode)); 629 630 op = &osd_req->r_ops[which]; 631 memset(op, 0, sizeof (*op)); 632 op->op = opcode; 633 op->flags = flags; 634 635 return op; 636 } 637 638 void osd_req_op_init(struct ceph_osd_request *osd_req, 639 unsigned int which, u16 opcode, u32 flags) 640 { 641 (void)_osd_req_op_init(osd_req, which, opcode, flags); 642 } 643 EXPORT_SYMBOL(osd_req_op_init); 644 645 void osd_req_op_extent_init(struct ceph_osd_request *osd_req, 646 unsigned int which, u16 opcode, 647 u64 offset, u64 length, 648 u64 truncate_size, u32 truncate_seq) 649 { 650 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 651 opcode, 0); 652 size_t payload_len = 0; 653 654 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 655 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO && 656 opcode != CEPH_OSD_OP_TRUNCATE); 657 658 op->extent.offset = offset; 659 op->extent.length = length; 660 op->extent.truncate_size = truncate_size; 661 op->extent.truncate_seq = truncate_seq; 662 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL) 663 payload_len += length; 664 665 op->indata_len = payload_len; 666 } 667 EXPORT_SYMBOL(osd_req_op_extent_init); 668 669 void osd_req_op_extent_update(struct ceph_osd_request *osd_req, 670 unsigned int which, u64 length) 671 { 672 struct ceph_osd_req_op *op; 673 u64 previous; 674 675 BUG_ON(which >= osd_req->r_num_ops); 676 op = &osd_req->r_ops[which]; 677 previous = op->extent.length; 678 679 if (length == previous) 680 return; /* Nothing to do */ 681 BUG_ON(length > previous); 682 683 op->extent.length = length; 684 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL) 685 op->indata_len -= previous - length; 686 } 687 EXPORT_SYMBOL(osd_req_op_extent_update); 688 689 void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req, 690 unsigned int which, u64 offset_inc) 691 { 692 struct ceph_osd_req_op *op, *prev_op; 693 694 BUG_ON(which + 1 >= osd_req->r_num_ops); 695 696 prev_op = &osd_req->r_ops[which]; 697 op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags); 698 /* dup previous one */ 699 op->indata_len = prev_op->indata_len; 700 op->outdata_len = prev_op->outdata_len; 701 op->extent = prev_op->extent; 702 /* adjust offset */ 703 op->extent.offset += offset_inc; 704 op->extent.length -= offset_inc; 705 706 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL) 707 op->indata_len -= offset_inc; 708 } 709 EXPORT_SYMBOL(osd_req_op_extent_dup_last); 710 711 void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which, 712 u16 opcode, const char *class, const char *method) 713 { 714 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 715 opcode, 0); 716 struct ceph_pagelist *pagelist; 717 size_t payload_len = 0; 718 size_t size; 719 720 BUG_ON(opcode != CEPH_OSD_OP_CALL); 721 722 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS); 723 BUG_ON(!pagelist); 724 ceph_pagelist_init(pagelist); 725 726 op->cls.class_name = class; 727 size = strlen(class); 728 BUG_ON(size > (size_t) U8_MAX); 729 op->cls.class_len = size; 730 ceph_pagelist_append(pagelist, class, size); 731 payload_len += size; 732 733 op->cls.method_name = method; 734 size = strlen(method); 735 BUG_ON(size > (size_t) U8_MAX); 736 op->cls.method_len = size; 737 ceph_pagelist_append(pagelist, method, size); 738 payload_len += size; 739 740 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist); 741 742 op->indata_len = payload_len; 743 } 744 EXPORT_SYMBOL(osd_req_op_cls_init); 745 746 int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which, 747 u16 opcode, const char *name, const void *value, 748 size_t size, u8 cmp_op, u8 cmp_mode) 749 { 750 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 751 opcode, 0); 752 struct ceph_pagelist *pagelist; 753 size_t payload_len; 754 755 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR); 756 757 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS); 758 if (!pagelist) 759 return -ENOMEM; 760 761 ceph_pagelist_init(pagelist); 762 763 payload_len = strlen(name); 764 op->xattr.name_len = payload_len; 765 ceph_pagelist_append(pagelist, name, payload_len); 766 767 op->xattr.value_len = size; 768 ceph_pagelist_append(pagelist, value, size); 769 payload_len += size; 770 771 op->xattr.cmp_op = cmp_op; 772 op->xattr.cmp_mode = cmp_mode; 773 774 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist); 775 op->indata_len = payload_len; 776 return 0; 777 } 778 EXPORT_SYMBOL(osd_req_op_xattr_init); 779 780 /* 781 * @watch_opcode: CEPH_OSD_WATCH_OP_* 782 */ 783 static void osd_req_op_watch_init(struct ceph_osd_request *req, int which, 784 u64 cookie, u8 watch_opcode) 785 { 786 struct ceph_osd_req_op *op; 787 788 op = _osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0); 789 op->watch.cookie = cookie; 790 op->watch.op = watch_opcode; 791 op->watch.gen = 0; 792 } 793 794 void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req, 795 unsigned int which, 796 u64 expected_object_size, 797 u64 expected_write_size) 798 { 799 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 800 CEPH_OSD_OP_SETALLOCHINT, 801 0); 802 803 op->alloc_hint.expected_object_size = expected_object_size; 804 op->alloc_hint.expected_write_size = expected_write_size; 805 806 /* 807 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed 808 * not worth a feature bit. Set FAILOK per-op flag to make 809 * sure older osds don't trip over an unsupported opcode. 810 */ 811 op->flags |= CEPH_OSD_OP_FLAG_FAILOK; 812 } 813 EXPORT_SYMBOL(osd_req_op_alloc_hint_init); 814 815 static void ceph_osdc_msg_data_add(struct ceph_msg *msg, 816 struct ceph_osd_data *osd_data) 817 { 818 u64 length = ceph_osd_data_length(osd_data); 819 820 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) { 821 BUG_ON(length > (u64) SIZE_MAX); 822 if (length) 823 ceph_msg_data_add_pages(msg, osd_data->pages, 824 length, osd_data->alignment); 825 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) { 826 BUG_ON(!length); 827 ceph_msg_data_add_pagelist(msg, osd_data->pagelist); 828 #ifdef CONFIG_BLOCK 829 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) { 830 ceph_msg_data_add_bio(msg, osd_data->bio, length); 831 #endif 832 } else { 833 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE); 834 } 835 } 836 837 static u32 osd_req_encode_op(struct ceph_osd_op *dst, 838 const struct ceph_osd_req_op *src) 839 { 840 if (WARN_ON(!osd_req_opcode_valid(src->op))) { 841 pr_err("unrecognized osd opcode %d\n", src->op); 842 843 return 0; 844 } 845 846 switch (src->op) { 847 case CEPH_OSD_OP_STAT: 848 break; 849 case CEPH_OSD_OP_READ: 850 case CEPH_OSD_OP_WRITE: 851 case CEPH_OSD_OP_WRITEFULL: 852 case CEPH_OSD_OP_ZERO: 853 case CEPH_OSD_OP_TRUNCATE: 854 dst->extent.offset = cpu_to_le64(src->extent.offset); 855 dst->extent.length = cpu_to_le64(src->extent.length); 856 dst->extent.truncate_size = 857 cpu_to_le64(src->extent.truncate_size); 858 dst->extent.truncate_seq = 859 cpu_to_le32(src->extent.truncate_seq); 860 break; 861 case CEPH_OSD_OP_CALL: 862 dst->cls.class_len = src->cls.class_len; 863 dst->cls.method_len = src->cls.method_len; 864 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len); 865 break; 866 case CEPH_OSD_OP_STARTSYNC: 867 break; 868 case CEPH_OSD_OP_WATCH: 869 dst->watch.cookie = cpu_to_le64(src->watch.cookie); 870 dst->watch.ver = cpu_to_le64(0); 871 dst->watch.op = src->watch.op; 872 dst->watch.gen = cpu_to_le32(src->watch.gen); 873 break; 874 case CEPH_OSD_OP_NOTIFY_ACK: 875 break; 876 case CEPH_OSD_OP_NOTIFY: 877 dst->notify.cookie = cpu_to_le64(src->notify.cookie); 878 break; 879 case CEPH_OSD_OP_LIST_WATCHERS: 880 break; 881 case CEPH_OSD_OP_SETALLOCHINT: 882 dst->alloc_hint.expected_object_size = 883 cpu_to_le64(src->alloc_hint.expected_object_size); 884 dst->alloc_hint.expected_write_size = 885 cpu_to_le64(src->alloc_hint.expected_write_size); 886 break; 887 case CEPH_OSD_OP_SETXATTR: 888 case CEPH_OSD_OP_CMPXATTR: 889 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len); 890 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len); 891 dst->xattr.cmp_op = src->xattr.cmp_op; 892 dst->xattr.cmp_mode = src->xattr.cmp_mode; 893 break; 894 case CEPH_OSD_OP_CREATE: 895 case CEPH_OSD_OP_DELETE: 896 break; 897 default: 898 pr_err("unsupported osd opcode %s\n", 899 ceph_osd_op_name(src->op)); 900 WARN_ON(1); 901 902 return 0; 903 } 904 905 dst->op = cpu_to_le16(src->op); 906 dst->flags = cpu_to_le32(src->flags); 907 dst->payload_len = cpu_to_le32(src->indata_len); 908 909 return src->indata_len; 910 } 911 912 /* 913 * build new request AND message, calculate layout, and adjust file 914 * extent as needed. 915 * 916 * if the file was recently truncated, we include information about its 917 * old and new size so that the object can be updated appropriately. (we 918 * avoid synchronously deleting truncated objects because it's slow.) 919 * 920 * if @do_sync, include a 'startsync' command so that the osd will flush 921 * data quickly. 922 */ 923 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, 924 struct ceph_file_layout *layout, 925 struct ceph_vino vino, 926 u64 off, u64 *plen, 927 unsigned int which, int num_ops, 928 int opcode, int flags, 929 struct ceph_snap_context *snapc, 930 u32 truncate_seq, 931 u64 truncate_size, 932 bool use_mempool) 933 { 934 struct ceph_osd_request *req; 935 u64 objnum = 0; 936 u64 objoff = 0; 937 u64 objlen = 0; 938 int r; 939 940 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 941 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE && 942 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE); 943 944 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool, 945 GFP_NOFS); 946 if (!req) { 947 r = -ENOMEM; 948 goto fail; 949 } 950 951 /* calculate max write size */ 952 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen); 953 if (r) 954 goto fail; 955 956 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) { 957 osd_req_op_init(req, which, opcode, 0); 958 } else { 959 u32 object_size = layout->object_size; 960 u32 object_base = off - objoff; 961 if (!(truncate_seq == 1 && truncate_size == -1ULL)) { 962 if (truncate_size <= object_base) { 963 truncate_size = 0; 964 } else { 965 truncate_size -= object_base; 966 if (truncate_size > object_size) 967 truncate_size = object_size; 968 } 969 } 970 osd_req_op_extent_init(req, which, opcode, objoff, objlen, 971 truncate_size, truncate_seq); 972 } 973 974 req->r_abort_on_full = true; 975 req->r_flags = flags; 976 req->r_base_oloc.pool = layout->pool_id; 977 req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns); 978 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum); 979 980 req->r_snapid = vino.snap; 981 if (flags & CEPH_OSD_FLAG_WRITE) 982 req->r_data_offset = off; 983 984 r = ceph_osdc_alloc_messages(req, GFP_NOFS); 985 if (r) 986 goto fail; 987 988 return req; 989 990 fail: 991 ceph_osdc_put_request(req); 992 return ERR_PTR(r); 993 } 994 EXPORT_SYMBOL(ceph_osdc_new_request); 995 996 /* 997 * We keep osd requests in an rbtree, sorted by ->r_tid. 998 */ 999 DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node) 1000 DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node) 1001 1002 static bool osd_homeless(struct ceph_osd *osd) 1003 { 1004 return osd->o_osd == CEPH_HOMELESS_OSD; 1005 } 1006 1007 static bool osd_registered(struct ceph_osd *osd) 1008 { 1009 verify_osdc_locked(osd->o_osdc); 1010 1011 return !RB_EMPTY_NODE(&osd->o_node); 1012 } 1013 1014 /* 1015 * Assumes @osd is zero-initialized. 1016 */ 1017 static void osd_init(struct ceph_osd *osd) 1018 { 1019 refcount_set(&osd->o_ref, 1); 1020 RB_CLEAR_NODE(&osd->o_node); 1021 osd->o_requests = RB_ROOT; 1022 osd->o_linger_requests = RB_ROOT; 1023 osd->o_backoff_mappings = RB_ROOT; 1024 osd->o_backoffs_by_id = RB_ROOT; 1025 INIT_LIST_HEAD(&osd->o_osd_lru); 1026 INIT_LIST_HEAD(&osd->o_keepalive_item); 1027 osd->o_incarnation = 1; 1028 mutex_init(&osd->lock); 1029 } 1030 1031 static void osd_cleanup(struct ceph_osd *osd) 1032 { 1033 WARN_ON(!RB_EMPTY_NODE(&osd->o_node)); 1034 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests)); 1035 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests)); 1036 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoff_mappings)); 1037 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoffs_by_id)); 1038 WARN_ON(!list_empty(&osd->o_osd_lru)); 1039 WARN_ON(!list_empty(&osd->o_keepalive_item)); 1040 1041 if (osd->o_auth.authorizer) { 1042 WARN_ON(osd_homeless(osd)); 1043 ceph_auth_destroy_authorizer(osd->o_auth.authorizer); 1044 } 1045 } 1046 1047 /* 1048 * Track open sessions with osds. 1049 */ 1050 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum) 1051 { 1052 struct ceph_osd *osd; 1053 1054 WARN_ON(onum == CEPH_HOMELESS_OSD); 1055 1056 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL); 1057 osd_init(osd); 1058 osd->o_osdc = osdc; 1059 osd->o_osd = onum; 1060 1061 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr); 1062 1063 return osd; 1064 } 1065 1066 static struct ceph_osd *get_osd(struct ceph_osd *osd) 1067 { 1068 if (refcount_inc_not_zero(&osd->o_ref)) { 1069 dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1, 1070 refcount_read(&osd->o_ref)); 1071 return osd; 1072 } else { 1073 dout("get_osd %p FAIL\n", osd); 1074 return NULL; 1075 } 1076 } 1077 1078 static void put_osd(struct ceph_osd *osd) 1079 { 1080 dout("put_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref), 1081 refcount_read(&osd->o_ref) - 1); 1082 if (refcount_dec_and_test(&osd->o_ref)) { 1083 osd_cleanup(osd); 1084 kfree(osd); 1085 } 1086 } 1087 1088 DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node) 1089 1090 static void __move_osd_to_lru(struct ceph_osd *osd) 1091 { 1092 struct ceph_osd_client *osdc = osd->o_osdc; 1093 1094 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1095 BUG_ON(!list_empty(&osd->o_osd_lru)); 1096 1097 spin_lock(&osdc->osd_lru_lock); 1098 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru); 1099 spin_unlock(&osdc->osd_lru_lock); 1100 1101 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl; 1102 } 1103 1104 static void maybe_move_osd_to_lru(struct ceph_osd *osd) 1105 { 1106 if (RB_EMPTY_ROOT(&osd->o_requests) && 1107 RB_EMPTY_ROOT(&osd->o_linger_requests)) 1108 __move_osd_to_lru(osd); 1109 } 1110 1111 static void __remove_osd_from_lru(struct ceph_osd *osd) 1112 { 1113 struct ceph_osd_client *osdc = osd->o_osdc; 1114 1115 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1116 1117 spin_lock(&osdc->osd_lru_lock); 1118 if (!list_empty(&osd->o_osd_lru)) 1119 list_del_init(&osd->o_osd_lru); 1120 spin_unlock(&osdc->osd_lru_lock); 1121 } 1122 1123 /* 1124 * Close the connection and assign any leftover requests to the 1125 * homeless session. 1126 */ 1127 static void close_osd(struct ceph_osd *osd) 1128 { 1129 struct ceph_osd_client *osdc = osd->o_osdc; 1130 struct rb_node *n; 1131 1132 verify_osdc_wrlocked(osdc); 1133 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1134 1135 ceph_con_close(&osd->o_con); 1136 1137 for (n = rb_first(&osd->o_requests); n; ) { 1138 struct ceph_osd_request *req = 1139 rb_entry(n, struct ceph_osd_request, r_node); 1140 1141 n = rb_next(n); /* unlink_request() */ 1142 1143 dout(" reassigning req %p tid %llu\n", req, req->r_tid); 1144 unlink_request(osd, req); 1145 link_request(&osdc->homeless_osd, req); 1146 } 1147 for (n = rb_first(&osd->o_linger_requests); n; ) { 1148 struct ceph_osd_linger_request *lreq = 1149 rb_entry(n, struct ceph_osd_linger_request, node); 1150 1151 n = rb_next(n); /* unlink_linger() */ 1152 1153 dout(" reassigning lreq %p linger_id %llu\n", lreq, 1154 lreq->linger_id); 1155 unlink_linger(osd, lreq); 1156 link_linger(&osdc->homeless_osd, lreq); 1157 } 1158 clear_backoffs(osd); 1159 1160 __remove_osd_from_lru(osd); 1161 erase_osd(&osdc->osds, osd); 1162 put_osd(osd); 1163 } 1164 1165 /* 1166 * reset osd connect 1167 */ 1168 static int reopen_osd(struct ceph_osd *osd) 1169 { 1170 struct ceph_entity_addr *peer_addr; 1171 1172 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1173 1174 if (RB_EMPTY_ROOT(&osd->o_requests) && 1175 RB_EMPTY_ROOT(&osd->o_linger_requests)) { 1176 close_osd(osd); 1177 return -ENODEV; 1178 } 1179 1180 peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd]; 1181 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) && 1182 !ceph_con_opened(&osd->o_con)) { 1183 struct rb_node *n; 1184 1185 dout("osd addr hasn't changed and connection never opened, " 1186 "letting msgr retry\n"); 1187 /* touch each r_stamp for handle_timeout()'s benfit */ 1188 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) { 1189 struct ceph_osd_request *req = 1190 rb_entry(n, struct ceph_osd_request, r_node); 1191 req->r_stamp = jiffies; 1192 } 1193 1194 return -EAGAIN; 1195 } 1196 1197 ceph_con_close(&osd->o_con); 1198 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr); 1199 osd->o_incarnation++; 1200 1201 return 0; 1202 } 1203 1204 static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o, 1205 bool wrlocked) 1206 { 1207 struct ceph_osd *osd; 1208 1209 if (wrlocked) 1210 verify_osdc_wrlocked(osdc); 1211 else 1212 verify_osdc_locked(osdc); 1213 1214 if (o != CEPH_HOMELESS_OSD) 1215 osd = lookup_osd(&osdc->osds, o); 1216 else 1217 osd = &osdc->homeless_osd; 1218 if (!osd) { 1219 if (!wrlocked) 1220 return ERR_PTR(-EAGAIN); 1221 1222 osd = create_osd(osdc, o); 1223 insert_osd(&osdc->osds, osd); 1224 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, 1225 &osdc->osdmap->osd_addr[osd->o_osd]); 1226 } 1227 1228 dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd); 1229 return osd; 1230 } 1231 1232 /* 1233 * Create request <-> OSD session relation. 1234 * 1235 * @req has to be assigned a tid, @osd may be homeless. 1236 */ 1237 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req) 1238 { 1239 verify_osd_locked(osd); 1240 WARN_ON(!req->r_tid || req->r_osd); 1241 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd, 1242 req, req->r_tid); 1243 1244 if (!osd_homeless(osd)) 1245 __remove_osd_from_lru(osd); 1246 else 1247 atomic_inc(&osd->o_osdc->num_homeless); 1248 1249 get_osd(osd); 1250 insert_request(&osd->o_requests, req); 1251 req->r_osd = osd; 1252 } 1253 1254 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req) 1255 { 1256 verify_osd_locked(osd); 1257 WARN_ON(req->r_osd != osd); 1258 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd, 1259 req, req->r_tid); 1260 1261 req->r_osd = NULL; 1262 erase_request(&osd->o_requests, req); 1263 put_osd(osd); 1264 1265 if (!osd_homeless(osd)) 1266 maybe_move_osd_to_lru(osd); 1267 else 1268 atomic_dec(&osd->o_osdc->num_homeless); 1269 } 1270 1271 static bool __pool_full(struct ceph_pg_pool_info *pi) 1272 { 1273 return pi->flags & CEPH_POOL_FLAG_FULL; 1274 } 1275 1276 static bool have_pool_full(struct ceph_osd_client *osdc) 1277 { 1278 struct rb_node *n; 1279 1280 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) { 1281 struct ceph_pg_pool_info *pi = 1282 rb_entry(n, struct ceph_pg_pool_info, node); 1283 1284 if (__pool_full(pi)) 1285 return true; 1286 } 1287 1288 return false; 1289 } 1290 1291 static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id) 1292 { 1293 struct ceph_pg_pool_info *pi; 1294 1295 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id); 1296 if (!pi) 1297 return false; 1298 1299 return __pool_full(pi); 1300 } 1301 1302 /* 1303 * Returns whether a request should be blocked from being sent 1304 * based on the current osdmap and osd_client settings. 1305 */ 1306 static bool target_should_be_paused(struct ceph_osd_client *osdc, 1307 const struct ceph_osd_request_target *t, 1308 struct ceph_pg_pool_info *pi) 1309 { 1310 bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 1311 bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 1312 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 1313 __pool_full(pi); 1314 1315 WARN_ON(pi->id != t->target_oloc.pool); 1316 return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) || 1317 ((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) || 1318 (osdc->osdmap->epoch < osdc->epoch_barrier); 1319 } 1320 1321 enum calc_target_result { 1322 CALC_TARGET_NO_ACTION = 0, 1323 CALC_TARGET_NEED_RESEND, 1324 CALC_TARGET_POOL_DNE, 1325 }; 1326 1327 static enum calc_target_result calc_target(struct ceph_osd_client *osdc, 1328 struct ceph_osd_request_target *t, 1329 struct ceph_connection *con, 1330 bool any_change) 1331 { 1332 struct ceph_pg_pool_info *pi; 1333 struct ceph_pg pgid, last_pgid; 1334 struct ceph_osds up, acting; 1335 bool force_resend = false; 1336 bool unpaused = false; 1337 bool legacy_change; 1338 bool split = false; 1339 bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE); 1340 bool recovery_deletes = ceph_osdmap_flag(osdc, 1341 CEPH_OSDMAP_RECOVERY_DELETES); 1342 enum calc_target_result ct_res; 1343 int ret; 1344 1345 t->epoch = osdc->osdmap->epoch; 1346 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool); 1347 if (!pi) { 1348 t->osd = CEPH_HOMELESS_OSD; 1349 ct_res = CALC_TARGET_POOL_DNE; 1350 goto out; 1351 } 1352 1353 if (osdc->osdmap->epoch == pi->last_force_request_resend) { 1354 if (t->last_force_resend < pi->last_force_request_resend) { 1355 t->last_force_resend = pi->last_force_request_resend; 1356 force_resend = true; 1357 } else if (t->last_force_resend == 0) { 1358 force_resend = true; 1359 } 1360 } 1361 1362 /* apply tiering */ 1363 ceph_oid_copy(&t->target_oid, &t->base_oid); 1364 ceph_oloc_copy(&t->target_oloc, &t->base_oloc); 1365 if ((t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) { 1366 if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0) 1367 t->target_oloc.pool = pi->read_tier; 1368 if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0) 1369 t->target_oloc.pool = pi->write_tier; 1370 1371 pi = ceph_pg_pool_by_id(osdc->osdmap, t->target_oloc.pool); 1372 if (!pi) { 1373 t->osd = CEPH_HOMELESS_OSD; 1374 ct_res = CALC_TARGET_POOL_DNE; 1375 goto out; 1376 } 1377 } 1378 1379 ret = __ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc, 1380 &pgid); 1381 if (ret) { 1382 WARN_ON(ret != -ENOENT); 1383 t->osd = CEPH_HOMELESS_OSD; 1384 ct_res = CALC_TARGET_POOL_DNE; 1385 goto out; 1386 } 1387 last_pgid.pool = pgid.pool; 1388 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask); 1389 1390 ceph_pg_to_up_acting_osds(osdc->osdmap, pi, &pgid, &up, &acting); 1391 if (any_change && 1392 ceph_is_new_interval(&t->acting, 1393 &acting, 1394 &t->up, 1395 &up, 1396 t->size, 1397 pi->size, 1398 t->min_size, 1399 pi->min_size, 1400 t->pg_num, 1401 pi->pg_num, 1402 t->sort_bitwise, 1403 sort_bitwise, 1404 t->recovery_deletes, 1405 recovery_deletes, 1406 &last_pgid)) 1407 force_resend = true; 1408 1409 if (t->paused && !target_should_be_paused(osdc, t, pi)) { 1410 t->paused = false; 1411 unpaused = true; 1412 } 1413 legacy_change = ceph_pg_compare(&t->pgid, &pgid) || 1414 ceph_osds_changed(&t->acting, &acting, any_change); 1415 if (t->pg_num) 1416 split = ceph_pg_is_split(&last_pgid, t->pg_num, pi->pg_num); 1417 1418 if (legacy_change || force_resend || split) { 1419 t->pgid = pgid; /* struct */ 1420 ceph_pg_to_primary_shard(osdc->osdmap, pi, &pgid, &t->spgid); 1421 ceph_osds_copy(&t->acting, &acting); 1422 ceph_osds_copy(&t->up, &up); 1423 t->size = pi->size; 1424 t->min_size = pi->min_size; 1425 t->pg_num = pi->pg_num; 1426 t->pg_num_mask = pi->pg_num_mask; 1427 t->sort_bitwise = sort_bitwise; 1428 t->recovery_deletes = recovery_deletes; 1429 1430 t->osd = acting.primary; 1431 } 1432 1433 if (unpaused || legacy_change || force_resend || 1434 (split && con && CEPH_HAVE_FEATURE(con->peer_features, 1435 RESEND_ON_SPLIT))) 1436 ct_res = CALC_TARGET_NEED_RESEND; 1437 else 1438 ct_res = CALC_TARGET_NO_ACTION; 1439 1440 out: 1441 dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd); 1442 return ct_res; 1443 } 1444 1445 static struct ceph_spg_mapping *alloc_spg_mapping(void) 1446 { 1447 struct ceph_spg_mapping *spg; 1448 1449 spg = kmalloc(sizeof(*spg), GFP_NOIO); 1450 if (!spg) 1451 return NULL; 1452 1453 RB_CLEAR_NODE(&spg->node); 1454 spg->backoffs = RB_ROOT; 1455 return spg; 1456 } 1457 1458 static void free_spg_mapping(struct ceph_spg_mapping *spg) 1459 { 1460 WARN_ON(!RB_EMPTY_NODE(&spg->node)); 1461 WARN_ON(!RB_EMPTY_ROOT(&spg->backoffs)); 1462 1463 kfree(spg); 1464 } 1465 1466 /* 1467 * rbtree of ceph_spg_mapping for handling map<spg_t, ...>, similar to 1468 * ceph_pg_mapping. Used to track OSD backoffs -- a backoff [range] is 1469 * defined only within a specific spgid; it does not pass anything to 1470 * children on split, or to another primary. 1471 */ 1472 DEFINE_RB_FUNCS2(spg_mapping, struct ceph_spg_mapping, spgid, ceph_spg_compare, 1473 RB_BYPTR, const struct ceph_spg *, node) 1474 1475 static u64 hoid_get_bitwise_key(const struct ceph_hobject_id *hoid) 1476 { 1477 return hoid->is_max ? 0x100000000ull : hoid->hash_reverse_bits; 1478 } 1479 1480 static void hoid_get_effective_key(const struct ceph_hobject_id *hoid, 1481 void **pkey, size_t *pkey_len) 1482 { 1483 if (hoid->key_len) { 1484 *pkey = hoid->key; 1485 *pkey_len = hoid->key_len; 1486 } else { 1487 *pkey = hoid->oid; 1488 *pkey_len = hoid->oid_len; 1489 } 1490 } 1491 1492 static int compare_names(const void *name1, size_t name1_len, 1493 const void *name2, size_t name2_len) 1494 { 1495 int ret; 1496 1497 ret = memcmp(name1, name2, min(name1_len, name2_len)); 1498 if (!ret) { 1499 if (name1_len < name2_len) 1500 ret = -1; 1501 else if (name1_len > name2_len) 1502 ret = 1; 1503 } 1504 return ret; 1505 } 1506 1507 static int hoid_compare(const struct ceph_hobject_id *lhs, 1508 const struct ceph_hobject_id *rhs) 1509 { 1510 void *effective_key1, *effective_key2; 1511 size_t effective_key1_len, effective_key2_len; 1512 int ret; 1513 1514 if (lhs->is_max < rhs->is_max) 1515 return -1; 1516 if (lhs->is_max > rhs->is_max) 1517 return 1; 1518 1519 if (lhs->pool < rhs->pool) 1520 return -1; 1521 if (lhs->pool > rhs->pool) 1522 return 1; 1523 1524 if (hoid_get_bitwise_key(lhs) < hoid_get_bitwise_key(rhs)) 1525 return -1; 1526 if (hoid_get_bitwise_key(lhs) > hoid_get_bitwise_key(rhs)) 1527 return 1; 1528 1529 ret = compare_names(lhs->nspace, lhs->nspace_len, 1530 rhs->nspace, rhs->nspace_len); 1531 if (ret) 1532 return ret; 1533 1534 hoid_get_effective_key(lhs, &effective_key1, &effective_key1_len); 1535 hoid_get_effective_key(rhs, &effective_key2, &effective_key2_len); 1536 ret = compare_names(effective_key1, effective_key1_len, 1537 effective_key2, effective_key2_len); 1538 if (ret) 1539 return ret; 1540 1541 ret = compare_names(lhs->oid, lhs->oid_len, rhs->oid, rhs->oid_len); 1542 if (ret) 1543 return ret; 1544 1545 if (lhs->snapid < rhs->snapid) 1546 return -1; 1547 if (lhs->snapid > rhs->snapid) 1548 return 1; 1549 1550 return 0; 1551 } 1552 1553 /* 1554 * For decoding ->begin and ->end of MOSDBackoff only -- no MIN/MAX 1555 * compat stuff here. 1556 * 1557 * Assumes @hoid is zero-initialized. 1558 */ 1559 static int decode_hoid(void **p, void *end, struct ceph_hobject_id *hoid) 1560 { 1561 u8 struct_v; 1562 u32 struct_len; 1563 int ret; 1564 1565 ret = ceph_start_decoding(p, end, 4, "hobject_t", &struct_v, 1566 &struct_len); 1567 if (ret) 1568 return ret; 1569 1570 if (struct_v < 4) { 1571 pr_err("got struct_v %d < 4 of hobject_t\n", struct_v); 1572 goto e_inval; 1573 } 1574 1575 hoid->key = ceph_extract_encoded_string(p, end, &hoid->key_len, 1576 GFP_NOIO); 1577 if (IS_ERR(hoid->key)) { 1578 ret = PTR_ERR(hoid->key); 1579 hoid->key = NULL; 1580 return ret; 1581 } 1582 1583 hoid->oid = ceph_extract_encoded_string(p, end, &hoid->oid_len, 1584 GFP_NOIO); 1585 if (IS_ERR(hoid->oid)) { 1586 ret = PTR_ERR(hoid->oid); 1587 hoid->oid = NULL; 1588 return ret; 1589 } 1590 1591 ceph_decode_64_safe(p, end, hoid->snapid, e_inval); 1592 ceph_decode_32_safe(p, end, hoid->hash, e_inval); 1593 ceph_decode_8_safe(p, end, hoid->is_max, e_inval); 1594 1595 hoid->nspace = ceph_extract_encoded_string(p, end, &hoid->nspace_len, 1596 GFP_NOIO); 1597 if (IS_ERR(hoid->nspace)) { 1598 ret = PTR_ERR(hoid->nspace); 1599 hoid->nspace = NULL; 1600 return ret; 1601 } 1602 1603 ceph_decode_64_safe(p, end, hoid->pool, e_inval); 1604 1605 ceph_hoid_build_hash_cache(hoid); 1606 return 0; 1607 1608 e_inval: 1609 return -EINVAL; 1610 } 1611 1612 static int hoid_encoding_size(const struct ceph_hobject_id *hoid) 1613 { 1614 return 8 + 4 + 1 + 8 + /* snapid, hash, is_max, pool */ 1615 4 + hoid->key_len + 4 + hoid->oid_len + 4 + hoid->nspace_len; 1616 } 1617 1618 static void encode_hoid(void **p, void *end, const struct ceph_hobject_id *hoid) 1619 { 1620 ceph_start_encoding(p, 4, 3, hoid_encoding_size(hoid)); 1621 ceph_encode_string(p, end, hoid->key, hoid->key_len); 1622 ceph_encode_string(p, end, hoid->oid, hoid->oid_len); 1623 ceph_encode_64(p, hoid->snapid); 1624 ceph_encode_32(p, hoid->hash); 1625 ceph_encode_8(p, hoid->is_max); 1626 ceph_encode_string(p, end, hoid->nspace, hoid->nspace_len); 1627 ceph_encode_64(p, hoid->pool); 1628 } 1629 1630 static void free_hoid(struct ceph_hobject_id *hoid) 1631 { 1632 if (hoid) { 1633 kfree(hoid->key); 1634 kfree(hoid->oid); 1635 kfree(hoid->nspace); 1636 kfree(hoid); 1637 } 1638 } 1639 1640 static struct ceph_osd_backoff *alloc_backoff(void) 1641 { 1642 struct ceph_osd_backoff *backoff; 1643 1644 backoff = kzalloc(sizeof(*backoff), GFP_NOIO); 1645 if (!backoff) 1646 return NULL; 1647 1648 RB_CLEAR_NODE(&backoff->spg_node); 1649 RB_CLEAR_NODE(&backoff->id_node); 1650 return backoff; 1651 } 1652 1653 static void free_backoff(struct ceph_osd_backoff *backoff) 1654 { 1655 WARN_ON(!RB_EMPTY_NODE(&backoff->spg_node)); 1656 WARN_ON(!RB_EMPTY_NODE(&backoff->id_node)); 1657 1658 free_hoid(backoff->begin); 1659 free_hoid(backoff->end); 1660 kfree(backoff); 1661 } 1662 1663 /* 1664 * Within a specific spgid, backoffs are managed by ->begin hoid. 1665 */ 1666 DEFINE_RB_INSDEL_FUNCS2(backoff, struct ceph_osd_backoff, begin, hoid_compare, 1667 RB_BYVAL, spg_node); 1668 1669 static struct ceph_osd_backoff *lookup_containing_backoff(struct rb_root *root, 1670 const struct ceph_hobject_id *hoid) 1671 { 1672 struct rb_node *n = root->rb_node; 1673 1674 while (n) { 1675 struct ceph_osd_backoff *cur = 1676 rb_entry(n, struct ceph_osd_backoff, spg_node); 1677 int cmp; 1678 1679 cmp = hoid_compare(hoid, cur->begin); 1680 if (cmp < 0) { 1681 n = n->rb_left; 1682 } else if (cmp > 0) { 1683 if (hoid_compare(hoid, cur->end) < 0) 1684 return cur; 1685 1686 n = n->rb_right; 1687 } else { 1688 return cur; 1689 } 1690 } 1691 1692 return NULL; 1693 } 1694 1695 /* 1696 * Each backoff has a unique id within its OSD session. 1697 */ 1698 DEFINE_RB_FUNCS(backoff_by_id, struct ceph_osd_backoff, id, id_node) 1699 1700 static void clear_backoffs(struct ceph_osd *osd) 1701 { 1702 while (!RB_EMPTY_ROOT(&osd->o_backoff_mappings)) { 1703 struct ceph_spg_mapping *spg = 1704 rb_entry(rb_first(&osd->o_backoff_mappings), 1705 struct ceph_spg_mapping, node); 1706 1707 while (!RB_EMPTY_ROOT(&spg->backoffs)) { 1708 struct ceph_osd_backoff *backoff = 1709 rb_entry(rb_first(&spg->backoffs), 1710 struct ceph_osd_backoff, spg_node); 1711 1712 erase_backoff(&spg->backoffs, backoff); 1713 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff); 1714 free_backoff(backoff); 1715 } 1716 erase_spg_mapping(&osd->o_backoff_mappings, spg); 1717 free_spg_mapping(spg); 1718 } 1719 } 1720 1721 /* 1722 * Set up a temporary, non-owning view into @t. 1723 */ 1724 static void hoid_fill_from_target(struct ceph_hobject_id *hoid, 1725 const struct ceph_osd_request_target *t) 1726 { 1727 hoid->key = NULL; 1728 hoid->key_len = 0; 1729 hoid->oid = t->target_oid.name; 1730 hoid->oid_len = t->target_oid.name_len; 1731 hoid->snapid = CEPH_NOSNAP; 1732 hoid->hash = t->pgid.seed; 1733 hoid->is_max = false; 1734 if (t->target_oloc.pool_ns) { 1735 hoid->nspace = t->target_oloc.pool_ns->str; 1736 hoid->nspace_len = t->target_oloc.pool_ns->len; 1737 } else { 1738 hoid->nspace = NULL; 1739 hoid->nspace_len = 0; 1740 } 1741 hoid->pool = t->target_oloc.pool; 1742 ceph_hoid_build_hash_cache(hoid); 1743 } 1744 1745 static bool should_plug_request(struct ceph_osd_request *req) 1746 { 1747 struct ceph_osd *osd = req->r_osd; 1748 struct ceph_spg_mapping *spg; 1749 struct ceph_osd_backoff *backoff; 1750 struct ceph_hobject_id hoid; 1751 1752 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &req->r_t.spgid); 1753 if (!spg) 1754 return false; 1755 1756 hoid_fill_from_target(&hoid, &req->r_t); 1757 backoff = lookup_containing_backoff(&spg->backoffs, &hoid); 1758 if (!backoff) 1759 return false; 1760 1761 dout("%s req %p tid %llu backoff osd%d spgid %llu.%xs%d id %llu\n", 1762 __func__, req, req->r_tid, osd->o_osd, backoff->spgid.pgid.pool, 1763 backoff->spgid.pgid.seed, backoff->spgid.shard, backoff->id); 1764 return true; 1765 } 1766 1767 static void setup_request_data(struct ceph_osd_request *req, 1768 struct ceph_msg *msg) 1769 { 1770 u32 data_len = 0; 1771 int i; 1772 1773 if (!list_empty(&msg->data)) 1774 return; 1775 1776 WARN_ON(msg->data_length); 1777 for (i = 0; i < req->r_num_ops; i++) { 1778 struct ceph_osd_req_op *op = &req->r_ops[i]; 1779 1780 switch (op->op) { 1781 /* request */ 1782 case CEPH_OSD_OP_WRITE: 1783 case CEPH_OSD_OP_WRITEFULL: 1784 WARN_ON(op->indata_len != op->extent.length); 1785 ceph_osdc_msg_data_add(msg, &op->extent.osd_data); 1786 break; 1787 case CEPH_OSD_OP_SETXATTR: 1788 case CEPH_OSD_OP_CMPXATTR: 1789 WARN_ON(op->indata_len != op->xattr.name_len + 1790 op->xattr.value_len); 1791 ceph_osdc_msg_data_add(msg, &op->xattr.osd_data); 1792 break; 1793 case CEPH_OSD_OP_NOTIFY_ACK: 1794 ceph_osdc_msg_data_add(msg, 1795 &op->notify_ack.request_data); 1796 break; 1797 1798 /* reply */ 1799 case CEPH_OSD_OP_STAT: 1800 ceph_osdc_msg_data_add(req->r_reply, 1801 &op->raw_data_in); 1802 break; 1803 case CEPH_OSD_OP_READ: 1804 ceph_osdc_msg_data_add(req->r_reply, 1805 &op->extent.osd_data); 1806 break; 1807 case CEPH_OSD_OP_LIST_WATCHERS: 1808 ceph_osdc_msg_data_add(req->r_reply, 1809 &op->list_watchers.response_data); 1810 break; 1811 1812 /* both */ 1813 case CEPH_OSD_OP_CALL: 1814 WARN_ON(op->indata_len != op->cls.class_len + 1815 op->cls.method_len + 1816 op->cls.indata_len); 1817 ceph_osdc_msg_data_add(msg, &op->cls.request_info); 1818 /* optional, can be NONE */ 1819 ceph_osdc_msg_data_add(msg, &op->cls.request_data); 1820 /* optional, can be NONE */ 1821 ceph_osdc_msg_data_add(req->r_reply, 1822 &op->cls.response_data); 1823 break; 1824 case CEPH_OSD_OP_NOTIFY: 1825 ceph_osdc_msg_data_add(msg, 1826 &op->notify.request_data); 1827 ceph_osdc_msg_data_add(req->r_reply, 1828 &op->notify.response_data); 1829 break; 1830 } 1831 1832 data_len += op->indata_len; 1833 } 1834 1835 WARN_ON(data_len != msg->data_length); 1836 } 1837 1838 static void encode_pgid(void **p, const struct ceph_pg *pgid) 1839 { 1840 ceph_encode_8(p, 1); 1841 ceph_encode_64(p, pgid->pool); 1842 ceph_encode_32(p, pgid->seed); 1843 ceph_encode_32(p, -1); /* preferred */ 1844 } 1845 1846 static void encode_spgid(void **p, const struct ceph_spg *spgid) 1847 { 1848 ceph_start_encoding(p, 1, 1, CEPH_PGID_ENCODING_LEN + 1); 1849 encode_pgid(p, &spgid->pgid); 1850 ceph_encode_8(p, spgid->shard); 1851 } 1852 1853 static void encode_oloc(void **p, void *end, 1854 const struct ceph_object_locator *oloc) 1855 { 1856 ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc)); 1857 ceph_encode_64(p, oloc->pool); 1858 ceph_encode_32(p, -1); /* preferred */ 1859 ceph_encode_32(p, 0); /* key len */ 1860 if (oloc->pool_ns) 1861 ceph_encode_string(p, end, oloc->pool_ns->str, 1862 oloc->pool_ns->len); 1863 else 1864 ceph_encode_32(p, 0); 1865 } 1866 1867 static void encode_request_partial(struct ceph_osd_request *req, 1868 struct ceph_msg *msg) 1869 { 1870 void *p = msg->front.iov_base; 1871 void *const end = p + msg->front_alloc_len; 1872 u32 data_len = 0; 1873 int i; 1874 1875 if (req->r_flags & CEPH_OSD_FLAG_WRITE) { 1876 /* snapshots aren't writeable */ 1877 WARN_ON(req->r_snapid != CEPH_NOSNAP); 1878 } else { 1879 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec || 1880 req->r_data_offset || req->r_snapc); 1881 } 1882 1883 setup_request_data(req, msg); 1884 1885 encode_spgid(&p, &req->r_t.spgid); /* actual spg */ 1886 ceph_encode_32(&p, req->r_t.pgid.seed); /* raw hash */ 1887 ceph_encode_32(&p, req->r_osdc->osdmap->epoch); 1888 ceph_encode_32(&p, req->r_flags); 1889 1890 /* reqid */ 1891 ceph_start_encoding(&p, 2, 2, sizeof(struct ceph_osd_reqid)); 1892 memset(p, 0, sizeof(struct ceph_osd_reqid)); 1893 p += sizeof(struct ceph_osd_reqid); 1894 1895 /* trace */ 1896 memset(p, 0, sizeof(struct ceph_blkin_trace_info)); 1897 p += sizeof(struct ceph_blkin_trace_info); 1898 1899 ceph_encode_32(&p, 0); /* client_inc, always 0 */ 1900 ceph_encode_timespec(p, &req->r_mtime); 1901 p += sizeof(struct ceph_timespec); 1902 1903 encode_oloc(&p, end, &req->r_t.target_oloc); 1904 ceph_encode_string(&p, end, req->r_t.target_oid.name, 1905 req->r_t.target_oid.name_len); 1906 1907 /* ops, can imply data */ 1908 ceph_encode_16(&p, req->r_num_ops); 1909 for (i = 0; i < req->r_num_ops; i++) { 1910 data_len += osd_req_encode_op(p, &req->r_ops[i]); 1911 p += sizeof(struct ceph_osd_op); 1912 } 1913 1914 ceph_encode_64(&p, req->r_snapid); /* snapid */ 1915 if (req->r_snapc) { 1916 ceph_encode_64(&p, req->r_snapc->seq); 1917 ceph_encode_32(&p, req->r_snapc->num_snaps); 1918 for (i = 0; i < req->r_snapc->num_snaps; i++) 1919 ceph_encode_64(&p, req->r_snapc->snaps[i]); 1920 } else { 1921 ceph_encode_64(&p, 0); /* snap_seq */ 1922 ceph_encode_32(&p, 0); /* snaps len */ 1923 } 1924 1925 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */ 1926 BUG_ON(p > end - 8); /* space for features */ 1927 1928 msg->hdr.version = cpu_to_le16(8); /* MOSDOp v8 */ 1929 /* front_len is finalized in encode_request_finish() */ 1930 msg->front.iov_len = p - msg->front.iov_base; 1931 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); 1932 msg->hdr.data_len = cpu_to_le32(data_len); 1933 /* 1934 * The header "data_off" is a hint to the receiver allowing it 1935 * to align received data into its buffers such that there's no 1936 * need to re-copy it before writing it to disk (direct I/O). 1937 */ 1938 msg->hdr.data_off = cpu_to_le16(req->r_data_offset); 1939 1940 dout("%s req %p msg %p oid %s oid_len %d\n", __func__, req, msg, 1941 req->r_t.target_oid.name, req->r_t.target_oid.name_len); 1942 } 1943 1944 static void encode_request_finish(struct ceph_msg *msg) 1945 { 1946 void *p = msg->front.iov_base; 1947 void *const partial_end = p + msg->front.iov_len; 1948 void *const end = p + msg->front_alloc_len; 1949 1950 if (CEPH_HAVE_FEATURE(msg->con->peer_features, RESEND_ON_SPLIT)) { 1951 /* luminous OSD -- encode features and be done */ 1952 p = partial_end; 1953 ceph_encode_64(&p, msg->con->peer_features); 1954 } else { 1955 struct { 1956 char spgid[CEPH_ENCODING_START_BLK_LEN + 1957 CEPH_PGID_ENCODING_LEN + 1]; 1958 __le32 hash; 1959 __le32 epoch; 1960 __le32 flags; 1961 char reqid[CEPH_ENCODING_START_BLK_LEN + 1962 sizeof(struct ceph_osd_reqid)]; 1963 char trace[sizeof(struct ceph_blkin_trace_info)]; 1964 __le32 client_inc; 1965 struct ceph_timespec mtime; 1966 } __packed head; 1967 struct ceph_pg pgid; 1968 void *oloc, *oid, *tail; 1969 int oloc_len, oid_len, tail_len; 1970 int len; 1971 1972 /* 1973 * Pre-luminous OSD -- reencode v8 into v4 using @head 1974 * as a temporary buffer. Encode the raw PG; the rest 1975 * is just a matter of moving oloc, oid and tail blobs 1976 * around. 1977 */ 1978 memcpy(&head, p, sizeof(head)); 1979 p += sizeof(head); 1980 1981 oloc = p; 1982 p += CEPH_ENCODING_START_BLK_LEN; 1983 pgid.pool = ceph_decode_64(&p); 1984 p += 4 + 4; /* preferred, key len */ 1985 len = ceph_decode_32(&p); 1986 p += len; /* nspace */ 1987 oloc_len = p - oloc; 1988 1989 oid = p; 1990 len = ceph_decode_32(&p); 1991 p += len; 1992 oid_len = p - oid; 1993 1994 tail = p; 1995 tail_len = partial_end - p; 1996 1997 p = msg->front.iov_base; 1998 ceph_encode_copy(&p, &head.client_inc, sizeof(head.client_inc)); 1999 ceph_encode_copy(&p, &head.epoch, sizeof(head.epoch)); 2000 ceph_encode_copy(&p, &head.flags, sizeof(head.flags)); 2001 ceph_encode_copy(&p, &head.mtime, sizeof(head.mtime)); 2002 2003 /* reassert_version */ 2004 memset(p, 0, sizeof(struct ceph_eversion)); 2005 p += sizeof(struct ceph_eversion); 2006 2007 BUG_ON(p >= oloc); 2008 memmove(p, oloc, oloc_len); 2009 p += oloc_len; 2010 2011 pgid.seed = le32_to_cpu(head.hash); 2012 encode_pgid(&p, &pgid); /* raw pg */ 2013 2014 BUG_ON(p >= oid); 2015 memmove(p, oid, oid_len); 2016 p += oid_len; 2017 2018 /* tail -- ops, snapid, snapc, retry_attempt */ 2019 BUG_ON(p >= tail); 2020 memmove(p, tail, tail_len); 2021 p += tail_len; 2022 2023 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */ 2024 } 2025 2026 BUG_ON(p > end); 2027 msg->front.iov_len = p - msg->front.iov_base; 2028 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); 2029 2030 dout("%s msg %p tid %llu %u+%u+%u v%d\n", __func__, msg, 2031 le64_to_cpu(msg->hdr.tid), le32_to_cpu(msg->hdr.front_len), 2032 le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len), 2033 le16_to_cpu(msg->hdr.version)); 2034 } 2035 2036 /* 2037 * @req has to be assigned a tid and registered. 2038 */ 2039 static void send_request(struct ceph_osd_request *req) 2040 { 2041 struct ceph_osd *osd = req->r_osd; 2042 2043 verify_osd_locked(osd); 2044 WARN_ON(osd->o_osd != req->r_t.osd); 2045 2046 /* backoff? */ 2047 if (should_plug_request(req)) 2048 return; 2049 2050 /* 2051 * We may have a previously queued request message hanging 2052 * around. Cancel it to avoid corrupting the msgr. 2053 */ 2054 if (req->r_sent) 2055 ceph_msg_revoke(req->r_request); 2056 2057 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR; 2058 if (req->r_attempts) 2059 req->r_flags |= CEPH_OSD_FLAG_RETRY; 2060 else 2061 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY); 2062 2063 encode_request_partial(req, req->r_request); 2064 2065 dout("%s req %p tid %llu to pgid %llu.%x spgid %llu.%xs%d osd%d e%u flags 0x%x attempt %d\n", 2066 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed, 2067 req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed, 2068 req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags, 2069 req->r_attempts); 2070 2071 req->r_t.paused = false; 2072 req->r_stamp = jiffies; 2073 req->r_attempts++; 2074 2075 req->r_sent = osd->o_incarnation; 2076 req->r_request->hdr.tid = cpu_to_le64(req->r_tid); 2077 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request)); 2078 } 2079 2080 static void maybe_request_map(struct ceph_osd_client *osdc) 2081 { 2082 bool continuous = false; 2083 2084 verify_osdc_locked(osdc); 2085 WARN_ON(!osdc->osdmap->epoch); 2086 2087 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 2088 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) || 2089 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) { 2090 dout("%s osdc %p continuous\n", __func__, osdc); 2091 continuous = true; 2092 } else { 2093 dout("%s osdc %p onetime\n", __func__, osdc); 2094 } 2095 2096 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP, 2097 osdc->osdmap->epoch + 1, continuous)) 2098 ceph_monc_renew_subs(&osdc->client->monc); 2099 } 2100 2101 static void complete_request(struct ceph_osd_request *req, int err); 2102 static void send_map_check(struct ceph_osd_request *req); 2103 2104 static void __submit_request(struct ceph_osd_request *req, bool wrlocked) 2105 { 2106 struct ceph_osd_client *osdc = req->r_osdc; 2107 struct ceph_osd *osd; 2108 enum calc_target_result ct_res; 2109 bool need_send = false; 2110 bool promoted = false; 2111 bool need_abort = false; 2112 2113 WARN_ON(req->r_tid); 2114 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked); 2115 2116 again: 2117 ct_res = calc_target(osdc, &req->r_t, NULL, false); 2118 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked) 2119 goto promote; 2120 2121 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked); 2122 if (IS_ERR(osd)) { 2123 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked); 2124 goto promote; 2125 } 2126 2127 if (osdc->osdmap->epoch < osdc->epoch_barrier) { 2128 dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch, 2129 osdc->epoch_barrier); 2130 req->r_t.paused = true; 2131 maybe_request_map(osdc); 2132 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 2133 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) { 2134 dout("req %p pausewr\n", req); 2135 req->r_t.paused = true; 2136 maybe_request_map(osdc); 2137 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) && 2138 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) { 2139 dout("req %p pauserd\n", req); 2140 req->r_t.paused = true; 2141 maybe_request_map(osdc); 2142 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 2143 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY | 2144 CEPH_OSD_FLAG_FULL_FORCE)) && 2145 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 2146 pool_full(osdc, req->r_t.base_oloc.pool))) { 2147 dout("req %p full/pool_full\n", req); 2148 pr_warn_ratelimited("FULL or reached pool quota\n"); 2149 req->r_t.paused = true; 2150 maybe_request_map(osdc); 2151 if (req->r_abort_on_full) 2152 need_abort = true; 2153 } else if (!osd_homeless(osd)) { 2154 need_send = true; 2155 } else { 2156 maybe_request_map(osdc); 2157 } 2158 2159 mutex_lock(&osd->lock); 2160 /* 2161 * Assign the tid atomically with send_request() to protect 2162 * multiple writes to the same object from racing with each 2163 * other, resulting in out of order ops on the OSDs. 2164 */ 2165 req->r_tid = atomic64_inc_return(&osdc->last_tid); 2166 link_request(osd, req); 2167 if (need_send) 2168 send_request(req); 2169 else if (need_abort) 2170 complete_request(req, -ENOSPC); 2171 mutex_unlock(&osd->lock); 2172 2173 if (ct_res == CALC_TARGET_POOL_DNE) 2174 send_map_check(req); 2175 2176 if (promoted) 2177 downgrade_write(&osdc->lock); 2178 return; 2179 2180 promote: 2181 up_read(&osdc->lock); 2182 down_write(&osdc->lock); 2183 wrlocked = true; 2184 promoted = true; 2185 goto again; 2186 } 2187 2188 static void account_request(struct ceph_osd_request *req) 2189 { 2190 WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK)); 2191 WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE))); 2192 2193 req->r_flags |= CEPH_OSD_FLAG_ONDISK; 2194 atomic_inc(&req->r_osdc->num_requests); 2195 2196 req->r_start_stamp = jiffies; 2197 } 2198 2199 static void submit_request(struct ceph_osd_request *req, bool wrlocked) 2200 { 2201 ceph_osdc_get_request(req); 2202 account_request(req); 2203 __submit_request(req, wrlocked); 2204 } 2205 2206 static void finish_request(struct ceph_osd_request *req) 2207 { 2208 struct ceph_osd_client *osdc = req->r_osdc; 2209 2210 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid)); 2211 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 2212 2213 if (req->r_osd) 2214 unlink_request(req->r_osd, req); 2215 atomic_dec(&osdc->num_requests); 2216 2217 /* 2218 * If an OSD has failed or returned and a request has been sent 2219 * twice, it's possible to get a reply and end up here while the 2220 * request message is queued for delivery. We will ignore the 2221 * reply, so not a big deal, but better to try and catch it. 2222 */ 2223 ceph_msg_revoke(req->r_request); 2224 ceph_msg_revoke_incoming(req->r_reply); 2225 } 2226 2227 static void __complete_request(struct ceph_osd_request *req) 2228 { 2229 if (req->r_callback) { 2230 dout("%s req %p tid %llu cb %pf result %d\n", __func__, req, 2231 req->r_tid, req->r_callback, req->r_result); 2232 req->r_callback(req); 2233 } 2234 } 2235 2236 /* 2237 * This is open-coded in handle_reply(). 2238 */ 2239 static void complete_request(struct ceph_osd_request *req, int err) 2240 { 2241 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err); 2242 2243 req->r_result = err; 2244 finish_request(req); 2245 __complete_request(req); 2246 complete_all(&req->r_completion); 2247 ceph_osdc_put_request(req); 2248 } 2249 2250 static void cancel_map_check(struct ceph_osd_request *req) 2251 { 2252 struct ceph_osd_client *osdc = req->r_osdc; 2253 struct ceph_osd_request *lookup_req; 2254 2255 verify_osdc_wrlocked(osdc); 2256 2257 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid); 2258 if (!lookup_req) 2259 return; 2260 2261 WARN_ON(lookup_req != req); 2262 erase_request_mc(&osdc->map_checks, req); 2263 ceph_osdc_put_request(req); 2264 } 2265 2266 static void cancel_request(struct ceph_osd_request *req) 2267 { 2268 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 2269 2270 cancel_map_check(req); 2271 finish_request(req); 2272 complete_all(&req->r_completion); 2273 ceph_osdc_put_request(req); 2274 } 2275 2276 static void abort_request(struct ceph_osd_request *req, int err) 2277 { 2278 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err); 2279 2280 cancel_map_check(req); 2281 complete_request(req, err); 2282 } 2283 2284 static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb) 2285 { 2286 if (likely(eb > osdc->epoch_barrier)) { 2287 dout("updating epoch_barrier from %u to %u\n", 2288 osdc->epoch_barrier, eb); 2289 osdc->epoch_barrier = eb; 2290 /* Request map if we're not to the barrier yet */ 2291 if (eb > osdc->osdmap->epoch) 2292 maybe_request_map(osdc); 2293 } 2294 } 2295 2296 void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb) 2297 { 2298 down_read(&osdc->lock); 2299 if (unlikely(eb > osdc->epoch_barrier)) { 2300 up_read(&osdc->lock); 2301 down_write(&osdc->lock); 2302 update_epoch_barrier(osdc, eb); 2303 up_write(&osdc->lock); 2304 } else { 2305 up_read(&osdc->lock); 2306 } 2307 } 2308 EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier); 2309 2310 /* 2311 * Drop all pending requests that are stalled waiting on a full condition to 2312 * clear, and complete them with ENOSPC as the return code. Set the 2313 * osdc->epoch_barrier to the latest map epoch that we've seen if any were 2314 * cancelled. 2315 */ 2316 static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc) 2317 { 2318 struct rb_node *n; 2319 bool victims = false; 2320 2321 dout("enter abort_on_full\n"); 2322 2323 if (!ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) && !have_pool_full(osdc)) 2324 goto out; 2325 2326 /* Scan list and see if there is anything to abort */ 2327 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 2328 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 2329 struct rb_node *m; 2330 2331 m = rb_first(&osd->o_requests); 2332 while (m) { 2333 struct ceph_osd_request *req = rb_entry(m, 2334 struct ceph_osd_request, r_node); 2335 m = rb_next(m); 2336 2337 if (req->r_abort_on_full) { 2338 victims = true; 2339 break; 2340 } 2341 } 2342 if (victims) 2343 break; 2344 } 2345 2346 if (!victims) 2347 goto out; 2348 2349 /* 2350 * Update the barrier to current epoch if it's behind that point, 2351 * since we know we have some calls to be aborted in the tree. 2352 */ 2353 update_epoch_barrier(osdc, osdc->osdmap->epoch); 2354 2355 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 2356 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 2357 struct rb_node *m; 2358 2359 m = rb_first(&osd->o_requests); 2360 while (m) { 2361 struct ceph_osd_request *req = rb_entry(m, 2362 struct ceph_osd_request, r_node); 2363 m = rb_next(m); 2364 2365 if (req->r_abort_on_full && 2366 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 2367 pool_full(osdc, req->r_t.target_oloc.pool))) 2368 abort_request(req, -ENOSPC); 2369 } 2370 } 2371 out: 2372 dout("return abort_on_full barrier=%u\n", osdc->epoch_barrier); 2373 } 2374 2375 static void check_pool_dne(struct ceph_osd_request *req) 2376 { 2377 struct ceph_osd_client *osdc = req->r_osdc; 2378 struct ceph_osdmap *map = osdc->osdmap; 2379 2380 verify_osdc_wrlocked(osdc); 2381 WARN_ON(!map->epoch); 2382 2383 if (req->r_attempts) { 2384 /* 2385 * We sent a request earlier, which means that 2386 * previously the pool existed, and now it does not 2387 * (i.e., it was deleted). 2388 */ 2389 req->r_map_dne_bound = map->epoch; 2390 dout("%s req %p tid %llu pool disappeared\n", __func__, req, 2391 req->r_tid); 2392 } else { 2393 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__, 2394 req, req->r_tid, req->r_map_dne_bound, map->epoch); 2395 } 2396 2397 if (req->r_map_dne_bound) { 2398 if (map->epoch >= req->r_map_dne_bound) { 2399 /* we had a new enough map */ 2400 pr_info_ratelimited("tid %llu pool does not exist\n", 2401 req->r_tid); 2402 complete_request(req, -ENOENT); 2403 } 2404 } else { 2405 send_map_check(req); 2406 } 2407 } 2408 2409 static void map_check_cb(struct ceph_mon_generic_request *greq) 2410 { 2411 struct ceph_osd_client *osdc = &greq->monc->client->osdc; 2412 struct ceph_osd_request *req; 2413 u64 tid = greq->private_data; 2414 2415 WARN_ON(greq->result || !greq->u.newest); 2416 2417 down_write(&osdc->lock); 2418 req = lookup_request_mc(&osdc->map_checks, tid); 2419 if (!req) { 2420 dout("%s tid %llu dne\n", __func__, tid); 2421 goto out_unlock; 2422 } 2423 2424 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__, 2425 req, req->r_tid, req->r_map_dne_bound, greq->u.newest); 2426 if (!req->r_map_dne_bound) 2427 req->r_map_dne_bound = greq->u.newest; 2428 erase_request_mc(&osdc->map_checks, req); 2429 check_pool_dne(req); 2430 2431 ceph_osdc_put_request(req); 2432 out_unlock: 2433 up_write(&osdc->lock); 2434 } 2435 2436 static void send_map_check(struct ceph_osd_request *req) 2437 { 2438 struct ceph_osd_client *osdc = req->r_osdc; 2439 struct ceph_osd_request *lookup_req; 2440 int ret; 2441 2442 verify_osdc_wrlocked(osdc); 2443 2444 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid); 2445 if (lookup_req) { 2446 WARN_ON(lookup_req != req); 2447 return; 2448 } 2449 2450 ceph_osdc_get_request(req); 2451 insert_request_mc(&osdc->map_checks, req); 2452 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap", 2453 map_check_cb, req->r_tid); 2454 WARN_ON(ret); 2455 } 2456 2457 /* 2458 * lingering requests, watch/notify v2 infrastructure 2459 */ 2460 static void linger_release(struct kref *kref) 2461 { 2462 struct ceph_osd_linger_request *lreq = 2463 container_of(kref, struct ceph_osd_linger_request, kref); 2464 2465 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq, 2466 lreq->reg_req, lreq->ping_req); 2467 WARN_ON(!RB_EMPTY_NODE(&lreq->node)); 2468 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node)); 2469 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node)); 2470 WARN_ON(!list_empty(&lreq->scan_item)); 2471 WARN_ON(!list_empty(&lreq->pending_lworks)); 2472 WARN_ON(lreq->osd); 2473 2474 if (lreq->reg_req) 2475 ceph_osdc_put_request(lreq->reg_req); 2476 if (lreq->ping_req) 2477 ceph_osdc_put_request(lreq->ping_req); 2478 target_destroy(&lreq->t); 2479 kfree(lreq); 2480 } 2481 2482 static void linger_put(struct ceph_osd_linger_request *lreq) 2483 { 2484 if (lreq) 2485 kref_put(&lreq->kref, linger_release); 2486 } 2487 2488 static struct ceph_osd_linger_request * 2489 linger_get(struct ceph_osd_linger_request *lreq) 2490 { 2491 kref_get(&lreq->kref); 2492 return lreq; 2493 } 2494 2495 static struct ceph_osd_linger_request * 2496 linger_alloc(struct ceph_osd_client *osdc) 2497 { 2498 struct ceph_osd_linger_request *lreq; 2499 2500 lreq = kzalloc(sizeof(*lreq), GFP_NOIO); 2501 if (!lreq) 2502 return NULL; 2503 2504 kref_init(&lreq->kref); 2505 mutex_init(&lreq->lock); 2506 RB_CLEAR_NODE(&lreq->node); 2507 RB_CLEAR_NODE(&lreq->osdc_node); 2508 RB_CLEAR_NODE(&lreq->mc_node); 2509 INIT_LIST_HEAD(&lreq->scan_item); 2510 INIT_LIST_HEAD(&lreq->pending_lworks); 2511 init_completion(&lreq->reg_commit_wait); 2512 init_completion(&lreq->notify_finish_wait); 2513 2514 lreq->osdc = osdc; 2515 target_init(&lreq->t); 2516 2517 dout("%s lreq %p\n", __func__, lreq); 2518 return lreq; 2519 } 2520 2521 DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node) 2522 DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node) 2523 DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node) 2524 2525 /* 2526 * Create linger request <-> OSD session relation. 2527 * 2528 * @lreq has to be registered, @osd may be homeless. 2529 */ 2530 static void link_linger(struct ceph_osd *osd, 2531 struct ceph_osd_linger_request *lreq) 2532 { 2533 verify_osd_locked(osd); 2534 WARN_ON(!lreq->linger_id || lreq->osd); 2535 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd, 2536 osd->o_osd, lreq, lreq->linger_id); 2537 2538 if (!osd_homeless(osd)) 2539 __remove_osd_from_lru(osd); 2540 else 2541 atomic_inc(&osd->o_osdc->num_homeless); 2542 2543 get_osd(osd); 2544 insert_linger(&osd->o_linger_requests, lreq); 2545 lreq->osd = osd; 2546 } 2547 2548 static void unlink_linger(struct ceph_osd *osd, 2549 struct ceph_osd_linger_request *lreq) 2550 { 2551 verify_osd_locked(osd); 2552 WARN_ON(lreq->osd != osd); 2553 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd, 2554 osd->o_osd, lreq, lreq->linger_id); 2555 2556 lreq->osd = NULL; 2557 erase_linger(&osd->o_linger_requests, lreq); 2558 put_osd(osd); 2559 2560 if (!osd_homeless(osd)) 2561 maybe_move_osd_to_lru(osd); 2562 else 2563 atomic_dec(&osd->o_osdc->num_homeless); 2564 } 2565 2566 static bool __linger_registered(struct ceph_osd_linger_request *lreq) 2567 { 2568 verify_osdc_locked(lreq->osdc); 2569 2570 return !RB_EMPTY_NODE(&lreq->osdc_node); 2571 } 2572 2573 static bool linger_registered(struct ceph_osd_linger_request *lreq) 2574 { 2575 struct ceph_osd_client *osdc = lreq->osdc; 2576 bool registered; 2577 2578 down_read(&osdc->lock); 2579 registered = __linger_registered(lreq); 2580 up_read(&osdc->lock); 2581 2582 return registered; 2583 } 2584 2585 static void linger_register(struct ceph_osd_linger_request *lreq) 2586 { 2587 struct ceph_osd_client *osdc = lreq->osdc; 2588 2589 verify_osdc_wrlocked(osdc); 2590 WARN_ON(lreq->linger_id); 2591 2592 linger_get(lreq); 2593 lreq->linger_id = ++osdc->last_linger_id; 2594 insert_linger_osdc(&osdc->linger_requests, lreq); 2595 } 2596 2597 static void linger_unregister(struct ceph_osd_linger_request *lreq) 2598 { 2599 struct ceph_osd_client *osdc = lreq->osdc; 2600 2601 verify_osdc_wrlocked(osdc); 2602 2603 erase_linger_osdc(&osdc->linger_requests, lreq); 2604 linger_put(lreq); 2605 } 2606 2607 static void cancel_linger_request(struct ceph_osd_request *req) 2608 { 2609 struct ceph_osd_linger_request *lreq = req->r_priv; 2610 2611 WARN_ON(!req->r_linger); 2612 cancel_request(req); 2613 linger_put(lreq); 2614 } 2615 2616 struct linger_work { 2617 struct work_struct work; 2618 struct ceph_osd_linger_request *lreq; 2619 struct list_head pending_item; 2620 unsigned long queued_stamp; 2621 2622 union { 2623 struct { 2624 u64 notify_id; 2625 u64 notifier_id; 2626 void *payload; /* points into @msg front */ 2627 size_t payload_len; 2628 2629 struct ceph_msg *msg; /* for ceph_msg_put() */ 2630 } notify; 2631 struct { 2632 int err; 2633 } error; 2634 }; 2635 }; 2636 2637 static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq, 2638 work_func_t workfn) 2639 { 2640 struct linger_work *lwork; 2641 2642 lwork = kzalloc(sizeof(*lwork), GFP_NOIO); 2643 if (!lwork) 2644 return NULL; 2645 2646 INIT_WORK(&lwork->work, workfn); 2647 INIT_LIST_HEAD(&lwork->pending_item); 2648 lwork->lreq = linger_get(lreq); 2649 2650 return lwork; 2651 } 2652 2653 static void lwork_free(struct linger_work *lwork) 2654 { 2655 struct ceph_osd_linger_request *lreq = lwork->lreq; 2656 2657 mutex_lock(&lreq->lock); 2658 list_del(&lwork->pending_item); 2659 mutex_unlock(&lreq->lock); 2660 2661 linger_put(lreq); 2662 kfree(lwork); 2663 } 2664 2665 static void lwork_queue(struct linger_work *lwork) 2666 { 2667 struct ceph_osd_linger_request *lreq = lwork->lreq; 2668 struct ceph_osd_client *osdc = lreq->osdc; 2669 2670 verify_lreq_locked(lreq); 2671 WARN_ON(!list_empty(&lwork->pending_item)); 2672 2673 lwork->queued_stamp = jiffies; 2674 list_add_tail(&lwork->pending_item, &lreq->pending_lworks); 2675 queue_work(osdc->notify_wq, &lwork->work); 2676 } 2677 2678 static void do_watch_notify(struct work_struct *w) 2679 { 2680 struct linger_work *lwork = container_of(w, struct linger_work, work); 2681 struct ceph_osd_linger_request *lreq = lwork->lreq; 2682 2683 if (!linger_registered(lreq)) { 2684 dout("%s lreq %p not registered\n", __func__, lreq); 2685 goto out; 2686 } 2687 2688 WARN_ON(!lreq->is_watch); 2689 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n", 2690 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id, 2691 lwork->notify.payload_len); 2692 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id, 2693 lwork->notify.notifier_id, lwork->notify.payload, 2694 lwork->notify.payload_len); 2695 2696 out: 2697 ceph_msg_put(lwork->notify.msg); 2698 lwork_free(lwork); 2699 } 2700 2701 static void do_watch_error(struct work_struct *w) 2702 { 2703 struct linger_work *lwork = container_of(w, struct linger_work, work); 2704 struct ceph_osd_linger_request *lreq = lwork->lreq; 2705 2706 if (!linger_registered(lreq)) { 2707 dout("%s lreq %p not registered\n", __func__, lreq); 2708 goto out; 2709 } 2710 2711 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err); 2712 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err); 2713 2714 out: 2715 lwork_free(lwork); 2716 } 2717 2718 static void queue_watch_error(struct ceph_osd_linger_request *lreq) 2719 { 2720 struct linger_work *lwork; 2721 2722 lwork = lwork_alloc(lreq, do_watch_error); 2723 if (!lwork) { 2724 pr_err("failed to allocate error-lwork\n"); 2725 return; 2726 } 2727 2728 lwork->error.err = lreq->last_error; 2729 lwork_queue(lwork); 2730 } 2731 2732 static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq, 2733 int result) 2734 { 2735 if (!completion_done(&lreq->reg_commit_wait)) { 2736 lreq->reg_commit_error = (result <= 0 ? result : 0); 2737 complete_all(&lreq->reg_commit_wait); 2738 } 2739 } 2740 2741 static void linger_commit_cb(struct ceph_osd_request *req) 2742 { 2743 struct ceph_osd_linger_request *lreq = req->r_priv; 2744 2745 mutex_lock(&lreq->lock); 2746 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq, 2747 lreq->linger_id, req->r_result); 2748 linger_reg_commit_complete(lreq, req->r_result); 2749 lreq->committed = true; 2750 2751 if (!lreq->is_watch) { 2752 struct ceph_osd_data *osd_data = 2753 osd_req_op_data(req, 0, notify, response_data); 2754 void *p = page_address(osd_data->pages[0]); 2755 2756 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY || 2757 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES); 2758 2759 /* make note of the notify_id */ 2760 if (req->r_ops[0].outdata_len >= sizeof(u64)) { 2761 lreq->notify_id = ceph_decode_64(&p); 2762 dout("lreq %p notify_id %llu\n", lreq, 2763 lreq->notify_id); 2764 } else { 2765 dout("lreq %p no notify_id\n", lreq); 2766 } 2767 } 2768 2769 mutex_unlock(&lreq->lock); 2770 linger_put(lreq); 2771 } 2772 2773 static int normalize_watch_error(int err) 2774 { 2775 /* 2776 * Translate ENOENT -> ENOTCONN so that a delete->disconnection 2777 * notification and a failure to reconnect because we raced with 2778 * the delete appear the same to the user. 2779 */ 2780 if (err == -ENOENT) 2781 err = -ENOTCONN; 2782 2783 return err; 2784 } 2785 2786 static void linger_reconnect_cb(struct ceph_osd_request *req) 2787 { 2788 struct ceph_osd_linger_request *lreq = req->r_priv; 2789 2790 mutex_lock(&lreq->lock); 2791 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__, 2792 lreq, lreq->linger_id, req->r_result, lreq->last_error); 2793 if (req->r_result < 0) { 2794 if (!lreq->last_error) { 2795 lreq->last_error = normalize_watch_error(req->r_result); 2796 queue_watch_error(lreq); 2797 } 2798 } 2799 2800 mutex_unlock(&lreq->lock); 2801 linger_put(lreq); 2802 } 2803 2804 static void send_linger(struct ceph_osd_linger_request *lreq) 2805 { 2806 struct ceph_osd_request *req = lreq->reg_req; 2807 struct ceph_osd_req_op *op = &req->r_ops[0]; 2808 2809 verify_osdc_wrlocked(req->r_osdc); 2810 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 2811 2812 if (req->r_osd) 2813 cancel_linger_request(req); 2814 2815 request_reinit(req); 2816 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 2817 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 2818 req->r_flags = lreq->t.flags; 2819 req->r_mtime = lreq->mtime; 2820 2821 mutex_lock(&lreq->lock); 2822 if (lreq->is_watch && lreq->committed) { 2823 WARN_ON(op->op != CEPH_OSD_OP_WATCH || 2824 op->watch.cookie != lreq->linger_id); 2825 op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT; 2826 op->watch.gen = ++lreq->register_gen; 2827 dout("lreq %p reconnect register_gen %u\n", lreq, 2828 op->watch.gen); 2829 req->r_callback = linger_reconnect_cb; 2830 } else { 2831 if (!lreq->is_watch) 2832 lreq->notify_id = 0; 2833 else 2834 WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH); 2835 dout("lreq %p register\n", lreq); 2836 req->r_callback = linger_commit_cb; 2837 } 2838 mutex_unlock(&lreq->lock); 2839 2840 req->r_priv = linger_get(lreq); 2841 req->r_linger = true; 2842 2843 submit_request(req, true); 2844 } 2845 2846 static void linger_ping_cb(struct ceph_osd_request *req) 2847 { 2848 struct ceph_osd_linger_request *lreq = req->r_priv; 2849 2850 mutex_lock(&lreq->lock); 2851 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n", 2852 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent, 2853 lreq->last_error); 2854 if (lreq->register_gen == req->r_ops[0].watch.gen) { 2855 if (!req->r_result) { 2856 lreq->watch_valid_thru = lreq->ping_sent; 2857 } else if (!lreq->last_error) { 2858 lreq->last_error = normalize_watch_error(req->r_result); 2859 queue_watch_error(lreq); 2860 } 2861 } else { 2862 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq, 2863 lreq->register_gen, req->r_ops[0].watch.gen); 2864 } 2865 2866 mutex_unlock(&lreq->lock); 2867 linger_put(lreq); 2868 } 2869 2870 static void send_linger_ping(struct ceph_osd_linger_request *lreq) 2871 { 2872 struct ceph_osd_client *osdc = lreq->osdc; 2873 struct ceph_osd_request *req = lreq->ping_req; 2874 struct ceph_osd_req_op *op = &req->r_ops[0]; 2875 2876 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) { 2877 dout("%s PAUSERD\n", __func__); 2878 return; 2879 } 2880 2881 lreq->ping_sent = jiffies; 2882 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n", 2883 __func__, lreq, lreq->linger_id, lreq->ping_sent, 2884 lreq->register_gen); 2885 2886 if (req->r_osd) 2887 cancel_linger_request(req); 2888 2889 request_reinit(req); 2890 target_copy(&req->r_t, &lreq->t); 2891 2892 WARN_ON(op->op != CEPH_OSD_OP_WATCH || 2893 op->watch.cookie != lreq->linger_id || 2894 op->watch.op != CEPH_OSD_WATCH_OP_PING); 2895 op->watch.gen = lreq->register_gen; 2896 req->r_callback = linger_ping_cb; 2897 req->r_priv = linger_get(lreq); 2898 req->r_linger = true; 2899 2900 ceph_osdc_get_request(req); 2901 account_request(req); 2902 req->r_tid = atomic64_inc_return(&osdc->last_tid); 2903 link_request(lreq->osd, req); 2904 send_request(req); 2905 } 2906 2907 static void linger_submit(struct ceph_osd_linger_request *lreq) 2908 { 2909 struct ceph_osd_client *osdc = lreq->osdc; 2910 struct ceph_osd *osd; 2911 2912 calc_target(osdc, &lreq->t, NULL, false); 2913 osd = lookup_create_osd(osdc, lreq->t.osd, true); 2914 link_linger(osd, lreq); 2915 2916 send_linger(lreq); 2917 } 2918 2919 static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq) 2920 { 2921 struct ceph_osd_client *osdc = lreq->osdc; 2922 struct ceph_osd_linger_request *lookup_lreq; 2923 2924 verify_osdc_wrlocked(osdc); 2925 2926 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks, 2927 lreq->linger_id); 2928 if (!lookup_lreq) 2929 return; 2930 2931 WARN_ON(lookup_lreq != lreq); 2932 erase_linger_mc(&osdc->linger_map_checks, lreq); 2933 linger_put(lreq); 2934 } 2935 2936 /* 2937 * @lreq has to be both registered and linked. 2938 */ 2939 static void __linger_cancel(struct ceph_osd_linger_request *lreq) 2940 { 2941 if (lreq->is_watch && lreq->ping_req->r_osd) 2942 cancel_linger_request(lreq->ping_req); 2943 if (lreq->reg_req->r_osd) 2944 cancel_linger_request(lreq->reg_req); 2945 cancel_linger_map_check(lreq); 2946 unlink_linger(lreq->osd, lreq); 2947 linger_unregister(lreq); 2948 } 2949 2950 static void linger_cancel(struct ceph_osd_linger_request *lreq) 2951 { 2952 struct ceph_osd_client *osdc = lreq->osdc; 2953 2954 down_write(&osdc->lock); 2955 if (__linger_registered(lreq)) 2956 __linger_cancel(lreq); 2957 up_write(&osdc->lock); 2958 } 2959 2960 static void send_linger_map_check(struct ceph_osd_linger_request *lreq); 2961 2962 static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq) 2963 { 2964 struct ceph_osd_client *osdc = lreq->osdc; 2965 struct ceph_osdmap *map = osdc->osdmap; 2966 2967 verify_osdc_wrlocked(osdc); 2968 WARN_ON(!map->epoch); 2969 2970 if (lreq->register_gen) { 2971 lreq->map_dne_bound = map->epoch; 2972 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__, 2973 lreq, lreq->linger_id); 2974 } else { 2975 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n", 2976 __func__, lreq, lreq->linger_id, lreq->map_dne_bound, 2977 map->epoch); 2978 } 2979 2980 if (lreq->map_dne_bound) { 2981 if (map->epoch >= lreq->map_dne_bound) { 2982 /* we had a new enough map */ 2983 pr_info("linger_id %llu pool does not exist\n", 2984 lreq->linger_id); 2985 linger_reg_commit_complete(lreq, -ENOENT); 2986 __linger_cancel(lreq); 2987 } 2988 } else { 2989 send_linger_map_check(lreq); 2990 } 2991 } 2992 2993 static void linger_map_check_cb(struct ceph_mon_generic_request *greq) 2994 { 2995 struct ceph_osd_client *osdc = &greq->monc->client->osdc; 2996 struct ceph_osd_linger_request *lreq; 2997 u64 linger_id = greq->private_data; 2998 2999 WARN_ON(greq->result || !greq->u.newest); 3000 3001 down_write(&osdc->lock); 3002 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id); 3003 if (!lreq) { 3004 dout("%s linger_id %llu dne\n", __func__, linger_id); 3005 goto out_unlock; 3006 } 3007 3008 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n", 3009 __func__, lreq, lreq->linger_id, lreq->map_dne_bound, 3010 greq->u.newest); 3011 if (!lreq->map_dne_bound) 3012 lreq->map_dne_bound = greq->u.newest; 3013 erase_linger_mc(&osdc->linger_map_checks, lreq); 3014 check_linger_pool_dne(lreq); 3015 3016 linger_put(lreq); 3017 out_unlock: 3018 up_write(&osdc->lock); 3019 } 3020 3021 static void send_linger_map_check(struct ceph_osd_linger_request *lreq) 3022 { 3023 struct ceph_osd_client *osdc = lreq->osdc; 3024 struct ceph_osd_linger_request *lookup_lreq; 3025 int ret; 3026 3027 verify_osdc_wrlocked(osdc); 3028 3029 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks, 3030 lreq->linger_id); 3031 if (lookup_lreq) { 3032 WARN_ON(lookup_lreq != lreq); 3033 return; 3034 } 3035 3036 linger_get(lreq); 3037 insert_linger_mc(&osdc->linger_map_checks, lreq); 3038 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap", 3039 linger_map_check_cb, lreq->linger_id); 3040 WARN_ON(ret); 3041 } 3042 3043 static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq) 3044 { 3045 int ret; 3046 3047 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 3048 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait); 3049 return ret ?: lreq->reg_commit_error; 3050 } 3051 3052 static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq) 3053 { 3054 int ret; 3055 3056 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 3057 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait); 3058 return ret ?: lreq->notify_finish_error; 3059 } 3060 3061 /* 3062 * Timeout callback, called every N seconds. When 1 or more OSD 3063 * requests has been active for more than N seconds, we send a keepalive 3064 * (tag + timestamp) to its OSD to ensure any communications channel 3065 * reset is detected. 3066 */ 3067 static void handle_timeout(struct work_struct *work) 3068 { 3069 struct ceph_osd_client *osdc = 3070 container_of(work, struct ceph_osd_client, timeout_work.work); 3071 struct ceph_options *opts = osdc->client->options; 3072 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout; 3073 unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout; 3074 LIST_HEAD(slow_osds); 3075 struct rb_node *n, *p; 3076 3077 dout("%s osdc %p\n", __func__, osdc); 3078 down_write(&osdc->lock); 3079 3080 /* 3081 * ping osds that are a bit slow. this ensures that if there 3082 * is a break in the TCP connection we will notice, and reopen 3083 * a connection with that osd (from the fault callback). 3084 */ 3085 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 3086 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 3087 bool found = false; 3088 3089 for (p = rb_first(&osd->o_requests); p; ) { 3090 struct ceph_osd_request *req = 3091 rb_entry(p, struct ceph_osd_request, r_node); 3092 3093 p = rb_next(p); /* abort_request() */ 3094 3095 if (time_before(req->r_stamp, cutoff)) { 3096 dout(" req %p tid %llu on osd%d is laggy\n", 3097 req, req->r_tid, osd->o_osd); 3098 found = true; 3099 } 3100 if (opts->osd_request_timeout && 3101 time_before(req->r_start_stamp, expiry_cutoff)) { 3102 pr_err_ratelimited("tid %llu on osd%d timeout\n", 3103 req->r_tid, osd->o_osd); 3104 abort_request(req, -ETIMEDOUT); 3105 } 3106 } 3107 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) { 3108 struct ceph_osd_linger_request *lreq = 3109 rb_entry(p, struct ceph_osd_linger_request, node); 3110 3111 dout(" lreq %p linger_id %llu is served by osd%d\n", 3112 lreq, lreq->linger_id, osd->o_osd); 3113 found = true; 3114 3115 mutex_lock(&lreq->lock); 3116 if (lreq->is_watch && lreq->committed && !lreq->last_error) 3117 send_linger_ping(lreq); 3118 mutex_unlock(&lreq->lock); 3119 } 3120 3121 if (found) 3122 list_move_tail(&osd->o_keepalive_item, &slow_osds); 3123 } 3124 3125 if (opts->osd_request_timeout) { 3126 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) { 3127 struct ceph_osd_request *req = 3128 rb_entry(p, struct ceph_osd_request, r_node); 3129 3130 p = rb_next(p); /* abort_request() */ 3131 3132 if (time_before(req->r_start_stamp, expiry_cutoff)) { 3133 pr_err_ratelimited("tid %llu on osd%d timeout\n", 3134 req->r_tid, osdc->homeless_osd.o_osd); 3135 abort_request(req, -ETIMEDOUT); 3136 } 3137 } 3138 } 3139 3140 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds)) 3141 maybe_request_map(osdc); 3142 3143 while (!list_empty(&slow_osds)) { 3144 struct ceph_osd *osd = list_first_entry(&slow_osds, 3145 struct ceph_osd, 3146 o_keepalive_item); 3147 list_del_init(&osd->o_keepalive_item); 3148 ceph_con_keepalive(&osd->o_con); 3149 } 3150 3151 up_write(&osdc->lock); 3152 schedule_delayed_work(&osdc->timeout_work, 3153 osdc->client->options->osd_keepalive_timeout); 3154 } 3155 3156 static void handle_osds_timeout(struct work_struct *work) 3157 { 3158 struct ceph_osd_client *osdc = 3159 container_of(work, struct ceph_osd_client, 3160 osds_timeout_work.work); 3161 unsigned long delay = osdc->client->options->osd_idle_ttl / 4; 3162 struct ceph_osd *osd, *nosd; 3163 3164 dout("%s osdc %p\n", __func__, osdc); 3165 down_write(&osdc->lock); 3166 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { 3167 if (time_before(jiffies, osd->lru_ttl)) 3168 break; 3169 3170 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests)); 3171 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests)); 3172 close_osd(osd); 3173 } 3174 3175 up_write(&osdc->lock); 3176 schedule_delayed_work(&osdc->osds_timeout_work, 3177 round_jiffies_relative(delay)); 3178 } 3179 3180 static int ceph_oloc_decode(void **p, void *end, 3181 struct ceph_object_locator *oloc) 3182 { 3183 u8 struct_v, struct_cv; 3184 u32 len; 3185 void *struct_end; 3186 int ret = 0; 3187 3188 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 3189 struct_v = ceph_decode_8(p); 3190 struct_cv = ceph_decode_8(p); 3191 if (struct_v < 3) { 3192 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n", 3193 struct_v, struct_cv); 3194 goto e_inval; 3195 } 3196 if (struct_cv > 6) { 3197 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n", 3198 struct_v, struct_cv); 3199 goto e_inval; 3200 } 3201 len = ceph_decode_32(p); 3202 ceph_decode_need(p, end, len, e_inval); 3203 struct_end = *p + len; 3204 3205 oloc->pool = ceph_decode_64(p); 3206 *p += 4; /* skip preferred */ 3207 3208 len = ceph_decode_32(p); 3209 if (len > 0) { 3210 pr_warn("ceph_object_locator::key is set\n"); 3211 goto e_inval; 3212 } 3213 3214 if (struct_v >= 5) { 3215 bool changed = false; 3216 3217 len = ceph_decode_32(p); 3218 if (len > 0) { 3219 ceph_decode_need(p, end, len, e_inval); 3220 if (!oloc->pool_ns || 3221 ceph_compare_string(oloc->pool_ns, *p, len)) 3222 changed = true; 3223 *p += len; 3224 } else { 3225 if (oloc->pool_ns) 3226 changed = true; 3227 } 3228 if (changed) { 3229 /* redirect changes namespace */ 3230 pr_warn("ceph_object_locator::nspace is changed\n"); 3231 goto e_inval; 3232 } 3233 } 3234 3235 if (struct_v >= 6) { 3236 s64 hash = ceph_decode_64(p); 3237 if (hash != -1) { 3238 pr_warn("ceph_object_locator::hash is set\n"); 3239 goto e_inval; 3240 } 3241 } 3242 3243 /* skip the rest */ 3244 *p = struct_end; 3245 out: 3246 return ret; 3247 3248 e_inval: 3249 ret = -EINVAL; 3250 goto out; 3251 } 3252 3253 static int ceph_redirect_decode(void **p, void *end, 3254 struct ceph_request_redirect *redir) 3255 { 3256 u8 struct_v, struct_cv; 3257 u32 len; 3258 void *struct_end; 3259 int ret; 3260 3261 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 3262 struct_v = ceph_decode_8(p); 3263 struct_cv = ceph_decode_8(p); 3264 if (struct_cv > 1) { 3265 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n", 3266 struct_v, struct_cv); 3267 goto e_inval; 3268 } 3269 len = ceph_decode_32(p); 3270 ceph_decode_need(p, end, len, e_inval); 3271 struct_end = *p + len; 3272 3273 ret = ceph_oloc_decode(p, end, &redir->oloc); 3274 if (ret) 3275 goto out; 3276 3277 len = ceph_decode_32(p); 3278 if (len > 0) { 3279 pr_warn("ceph_request_redirect::object_name is set\n"); 3280 goto e_inval; 3281 } 3282 3283 len = ceph_decode_32(p); 3284 *p += len; /* skip osd_instructions */ 3285 3286 /* skip the rest */ 3287 *p = struct_end; 3288 out: 3289 return ret; 3290 3291 e_inval: 3292 ret = -EINVAL; 3293 goto out; 3294 } 3295 3296 struct MOSDOpReply { 3297 struct ceph_pg pgid; 3298 u64 flags; 3299 int result; 3300 u32 epoch; 3301 int num_ops; 3302 u32 outdata_len[CEPH_OSD_MAX_OPS]; 3303 s32 rval[CEPH_OSD_MAX_OPS]; 3304 int retry_attempt; 3305 struct ceph_eversion replay_version; 3306 u64 user_version; 3307 struct ceph_request_redirect redirect; 3308 }; 3309 3310 static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m) 3311 { 3312 void *p = msg->front.iov_base; 3313 void *const end = p + msg->front.iov_len; 3314 u16 version = le16_to_cpu(msg->hdr.version); 3315 struct ceph_eversion bad_replay_version; 3316 u8 decode_redir; 3317 u32 len; 3318 int ret; 3319 int i; 3320 3321 ceph_decode_32_safe(&p, end, len, e_inval); 3322 ceph_decode_need(&p, end, len, e_inval); 3323 p += len; /* skip oid */ 3324 3325 ret = ceph_decode_pgid(&p, end, &m->pgid); 3326 if (ret) 3327 return ret; 3328 3329 ceph_decode_64_safe(&p, end, m->flags, e_inval); 3330 ceph_decode_32_safe(&p, end, m->result, e_inval); 3331 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval); 3332 memcpy(&bad_replay_version, p, sizeof(bad_replay_version)); 3333 p += sizeof(bad_replay_version); 3334 ceph_decode_32_safe(&p, end, m->epoch, e_inval); 3335 3336 ceph_decode_32_safe(&p, end, m->num_ops, e_inval); 3337 if (m->num_ops > ARRAY_SIZE(m->outdata_len)) 3338 goto e_inval; 3339 3340 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op), 3341 e_inval); 3342 for (i = 0; i < m->num_ops; i++) { 3343 struct ceph_osd_op *op = p; 3344 3345 m->outdata_len[i] = le32_to_cpu(op->payload_len); 3346 p += sizeof(*op); 3347 } 3348 3349 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval); 3350 for (i = 0; i < m->num_ops; i++) 3351 ceph_decode_32_safe(&p, end, m->rval[i], e_inval); 3352 3353 if (version >= 5) { 3354 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval); 3355 memcpy(&m->replay_version, p, sizeof(m->replay_version)); 3356 p += sizeof(m->replay_version); 3357 ceph_decode_64_safe(&p, end, m->user_version, e_inval); 3358 } else { 3359 m->replay_version = bad_replay_version; /* struct */ 3360 m->user_version = le64_to_cpu(m->replay_version.version); 3361 } 3362 3363 if (version >= 6) { 3364 if (version >= 7) 3365 ceph_decode_8_safe(&p, end, decode_redir, e_inval); 3366 else 3367 decode_redir = 1; 3368 } else { 3369 decode_redir = 0; 3370 } 3371 3372 if (decode_redir) { 3373 ret = ceph_redirect_decode(&p, end, &m->redirect); 3374 if (ret) 3375 return ret; 3376 } else { 3377 ceph_oloc_init(&m->redirect.oloc); 3378 } 3379 3380 return 0; 3381 3382 e_inval: 3383 return -EINVAL; 3384 } 3385 3386 /* 3387 * Handle MOSDOpReply. Set ->r_result and call the callback if it is 3388 * specified. 3389 */ 3390 static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg) 3391 { 3392 struct ceph_osd_client *osdc = osd->o_osdc; 3393 struct ceph_osd_request *req; 3394 struct MOSDOpReply m; 3395 u64 tid = le64_to_cpu(msg->hdr.tid); 3396 u32 data_len = 0; 3397 int ret; 3398 int i; 3399 3400 dout("%s msg %p tid %llu\n", __func__, msg, tid); 3401 3402 down_read(&osdc->lock); 3403 if (!osd_registered(osd)) { 3404 dout("%s osd%d unknown\n", __func__, osd->o_osd); 3405 goto out_unlock_osdc; 3406 } 3407 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num)); 3408 3409 mutex_lock(&osd->lock); 3410 req = lookup_request(&osd->o_requests, tid); 3411 if (!req) { 3412 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid); 3413 goto out_unlock_session; 3414 } 3415 3416 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns; 3417 ret = decode_MOSDOpReply(msg, &m); 3418 m.redirect.oloc.pool_ns = NULL; 3419 if (ret) { 3420 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n", 3421 req->r_tid, ret); 3422 ceph_msg_dump(msg); 3423 goto fail_request; 3424 } 3425 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n", 3426 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed, 3427 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch), 3428 le64_to_cpu(m.replay_version.version), m.user_version); 3429 3430 if (m.retry_attempt >= 0) { 3431 if (m.retry_attempt != req->r_attempts - 1) { 3432 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n", 3433 req, req->r_tid, m.retry_attempt, 3434 req->r_attempts - 1); 3435 goto out_unlock_session; 3436 } 3437 } else { 3438 WARN_ON(1); /* MOSDOpReply v4 is assumed */ 3439 } 3440 3441 if (!ceph_oloc_empty(&m.redirect.oloc)) { 3442 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid, 3443 m.redirect.oloc.pool); 3444 unlink_request(osd, req); 3445 mutex_unlock(&osd->lock); 3446 3447 /* 3448 * Not ceph_oloc_copy() - changing pool_ns is not 3449 * supported. 3450 */ 3451 req->r_t.target_oloc.pool = m.redirect.oloc.pool; 3452 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED; 3453 req->r_tid = 0; 3454 __submit_request(req, false); 3455 goto out_unlock_osdc; 3456 } 3457 3458 if (m.num_ops != req->r_num_ops) { 3459 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops, 3460 req->r_num_ops, req->r_tid); 3461 goto fail_request; 3462 } 3463 for (i = 0; i < req->r_num_ops; i++) { 3464 dout(" req %p tid %llu op %d rval %d len %u\n", req, 3465 req->r_tid, i, m.rval[i], m.outdata_len[i]); 3466 req->r_ops[i].rval = m.rval[i]; 3467 req->r_ops[i].outdata_len = m.outdata_len[i]; 3468 data_len += m.outdata_len[i]; 3469 } 3470 if (data_len != le32_to_cpu(msg->hdr.data_len)) { 3471 pr_err("sum of lens %u != %u for tid %llu\n", data_len, 3472 le32_to_cpu(msg->hdr.data_len), req->r_tid); 3473 goto fail_request; 3474 } 3475 dout("%s req %p tid %llu result %d data_len %u\n", __func__, 3476 req, req->r_tid, m.result, data_len); 3477 3478 /* 3479 * Since we only ever request ONDISK, we should only ever get 3480 * one (type of) reply back. 3481 */ 3482 WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK)); 3483 req->r_result = m.result ?: data_len; 3484 finish_request(req); 3485 mutex_unlock(&osd->lock); 3486 up_read(&osdc->lock); 3487 3488 __complete_request(req); 3489 complete_all(&req->r_completion); 3490 ceph_osdc_put_request(req); 3491 return; 3492 3493 fail_request: 3494 complete_request(req, -EIO); 3495 out_unlock_session: 3496 mutex_unlock(&osd->lock); 3497 out_unlock_osdc: 3498 up_read(&osdc->lock); 3499 } 3500 3501 static void set_pool_was_full(struct ceph_osd_client *osdc) 3502 { 3503 struct rb_node *n; 3504 3505 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) { 3506 struct ceph_pg_pool_info *pi = 3507 rb_entry(n, struct ceph_pg_pool_info, node); 3508 3509 pi->was_full = __pool_full(pi); 3510 } 3511 } 3512 3513 static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id) 3514 { 3515 struct ceph_pg_pool_info *pi; 3516 3517 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id); 3518 if (!pi) 3519 return false; 3520 3521 return pi->was_full && !__pool_full(pi); 3522 } 3523 3524 static enum calc_target_result 3525 recalc_linger_target(struct ceph_osd_linger_request *lreq) 3526 { 3527 struct ceph_osd_client *osdc = lreq->osdc; 3528 enum calc_target_result ct_res; 3529 3530 ct_res = calc_target(osdc, &lreq->t, NULL, true); 3531 if (ct_res == CALC_TARGET_NEED_RESEND) { 3532 struct ceph_osd *osd; 3533 3534 osd = lookup_create_osd(osdc, lreq->t.osd, true); 3535 if (osd != lreq->osd) { 3536 unlink_linger(lreq->osd, lreq); 3537 link_linger(osd, lreq); 3538 } 3539 } 3540 3541 return ct_res; 3542 } 3543 3544 /* 3545 * Requeue requests whose mapping to an OSD has changed. 3546 */ 3547 static void scan_requests(struct ceph_osd *osd, 3548 bool force_resend, 3549 bool cleared_full, 3550 bool check_pool_cleared_full, 3551 struct rb_root *need_resend, 3552 struct list_head *need_resend_linger) 3553 { 3554 struct ceph_osd_client *osdc = osd->o_osdc; 3555 struct rb_node *n; 3556 bool force_resend_writes; 3557 3558 for (n = rb_first(&osd->o_linger_requests); n; ) { 3559 struct ceph_osd_linger_request *lreq = 3560 rb_entry(n, struct ceph_osd_linger_request, node); 3561 enum calc_target_result ct_res; 3562 3563 n = rb_next(n); /* recalc_linger_target() */ 3564 3565 dout("%s lreq %p linger_id %llu\n", __func__, lreq, 3566 lreq->linger_id); 3567 ct_res = recalc_linger_target(lreq); 3568 switch (ct_res) { 3569 case CALC_TARGET_NO_ACTION: 3570 force_resend_writes = cleared_full || 3571 (check_pool_cleared_full && 3572 pool_cleared_full(osdc, lreq->t.base_oloc.pool)); 3573 if (!force_resend && !force_resend_writes) 3574 break; 3575 3576 /* fall through */ 3577 case CALC_TARGET_NEED_RESEND: 3578 cancel_linger_map_check(lreq); 3579 /* 3580 * scan_requests() for the previous epoch(s) 3581 * may have already added it to the list, since 3582 * it's not unlinked here. 3583 */ 3584 if (list_empty(&lreq->scan_item)) 3585 list_add_tail(&lreq->scan_item, need_resend_linger); 3586 break; 3587 case CALC_TARGET_POOL_DNE: 3588 list_del_init(&lreq->scan_item); 3589 check_linger_pool_dne(lreq); 3590 break; 3591 } 3592 } 3593 3594 for (n = rb_first(&osd->o_requests); n; ) { 3595 struct ceph_osd_request *req = 3596 rb_entry(n, struct ceph_osd_request, r_node); 3597 enum calc_target_result ct_res; 3598 3599 n = rb_next(n); /* unlink_request(), check_pool_dne() */ 3600 3601 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 3602 ct_res = calc_target(osdc, &req->r_t, &req->r_osd->o_con, 3603 false); 3604 switch (ct_res) { 3605 case CALC_TARGET_NO_ACTION: 3606 force_resend_writes = cleared_full || 3607 (check_pool_cleared_full && 3608 pool_cleared_full(osdc, req->r_t.base_oloc.pool)); 3609 if (!force_resend && 3610 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) || 3611 !force_resend_writes)) 3612 break; 3613 3614 /* fall through */ 3615 case CALC_TARGET_NEED_RESEND: 3616 cancel_map_check(req); 3617 unlink_request(osd, req); 3618 insert_request(need_resend, req); 3619 break; 3620 case CALC_TARGET_POOL_DNE: 3621 check_pool_dne(req); 3622 break; 3623 } 3624 } 3625 } 3626 3627 static int handle_one_map(struct ceph_osd_client *osdc, 3628 void *p, void *end, bool incremental, 3629 struct rb_root *need_resend, 3630 struct list_head *need_resend_linger) 3631 { 3632 struct ceph_osdmap *newmap; 3633 struct rb_node *n; 3634 bool skipped_map = false; 3635 bool was_full; 3636 3637 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL); 3638 set_pool_was_full(osdc); 3639 3640 if (incremental) 3641 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap); 3642 else 3643 newmap = ceph_osdmap_decode(&p, end); 3644 if (IS_ERR(newmap)) 3645 return PTR_ERR(newmap); 3646 3647 if (newmap != osdc->osdmap) { 3648 /* 3649 * Preserve ->was_full before destroying the old map. 3650 * For pools that weren't in the old map, ->was_full 3651 * should be false. 3652 */ 3653 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) { 3654 struct ceph_pg_pool_info *pi = 3655 rb_entry(n, struct ceph_pg_pool_info, node); 3656 struct ceph_pg_pool_info *old_pi; 3657 3658 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id); 3659 if (old_pi) 3660 pi->was_full = old_pi->was_full; 3661 else 3662 WARN_ON(pi->was_full); 3663 } 3664 3665 if (osdc->osdmap->epoch && 3666 osdc->osdmap->epoch + 1 < newmap->epoch) { 3667 WARN_ON(incremental); 3668 skipped_map = true; 3669 } 3670 3671 ceph_osdmap_destroy(osdc->osdmap); 3672 osdc->osdmap = newmap; 3673 } 3674 3675 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL); 3676 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true, 3677 need_resend, need_resend_linger); 3678 3679 for (n = rb_first(&osdc->osds); n; ) { 3680 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 3681 3682 n = rb_next(n); /* close_osd() */ 3683 3684 scan_requests(osd, skipped_map, was_full, true, need_resend, 3685 need_resend_linger); 3686 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || 3687 memcmp(&osd->o_con.peer_addr, 3688 ceph_osd_addr(osdc->osdmap, osd->o_osd), 3689 sizeof(struct ceph_entity_addr))) 3690 close_osd(osd); 3691 } 3692 3693 return 0; 3694 } 3695 3696 static void kick_requests(struct ceph_osd_client *osdc, 3697 struct rb_root *need_resend, 3698 struct list_head *need_resend_linger) 3699 { 3700 struct ceph_osd_linger_request *lreq, *nlreq; 3701 enum calc_target_result ct_res; 3702 struct rb_node *n; 3703 3704 /* make sure need_resend targets reflect latest map */ 3705 for (n = rb_first(need_resend); n; ) { 3706 struct ceph_osd_request *req = 3707 rb_entry(n, struct ceph_osd_request, r_node); 3708 3709 n = rb_next(n); 3710 3711 if (req->r_t.epoch < osdc->osdmap->epoch) { 3712 ct_res = calc_target(osdc, &req->r_t, NULL, false); 3713 if (ct_res == CALC_TARGET_POOL_DNE) { 3714 erase_request(need_resend, req); 3715 check_pool_dne(req); 3716 } 3717 } 3718 } 3719 3720 for (n = rb_first(need_resend); n; ) { 3721 struct ceph_osd_request *req = 3722 rb_entry(n, struct ceph_osd_request, r_node); 3723 struct ceph_osd *osd; 3724 3725 n = rb_next(n); 3726 erase_request(need_resend, req); /* before link_request() */ 3727 3728 osd = lookup_create_osd(osdc, req->r_t.osd, true); 3729 link_request(osd, req); 3730 if (!req->r_linger) { 3731 if (!osd_homeless(osd) && !req->r_t.paused) 3732 send_request(req); 3733 } else { 3734 cancel_linger_request(req); 3735 } 3736 } 3737 3738 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) { 3739 if (!osd_homeless(lreq->osd)) 3740 send_linger(lreq); 3741 3742 list_del_init(&lreq->scan_item); 3743 } 3744 } 3745 3746 /* 3747 * Process updated osd map. 3748 * 3749 * The message contains any number of incremental and full maps, normally 3750 * indicating some sort of topology change in the cluster. Kick requests 3751 * off to different OSDs as needed. 3752 */ 3753 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) 3754 { 3755 void *p = msg->front.iov_base; 3756 void *const end = p + msg->front.iov_len; 3757 u32 nr_maps, maplen; 3758 u32 epoch; 3759 struct ceph_fsid fsid; 3760 struct rb_root need_resend = RB_ROOT; 3761 LIST_HEAD(need_resend_linger); 3762 bool handled_incremental = false; 3763 bool was_pauserd, was_pausewr; 3764 bool pauserd, pausewr; 3765 int err; 3766 3767 dout("%s have %u\n", __func__, osdc->osdmap->epoch); 3768 down_write(&osdc->lock); 3769 3770 /* verify fsid */ 3771 ceph_decode_need(&p, end, sizeof(fsid), bad); 3772 ceph_decode_copy(&p, &fsid, sizeof(fsid)); 3773 if (ceph_check_fsid(osdc->client, &fsid) < 0) 3774 goto bad; 3775 3776 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 3777 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 3778 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 3779 have_pool_full(osdc); 3780 3781 /* incremental maps */ 3782 ceph_decode_32_safe(&p, end, nr_maps, bad); 3783 dout(" %d inc maps\n", nr_maps); 3784 while (nr_maps > 0) { 3785 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 3786 epoch = ceph_decode_32(&p); 3787 maplen = ceph_decode_32(&p); 3788 ceph_decode_need(&p, end, maplen, bad); 3789 if (osdc->osdmap->epoch && 3790 osdc->osdmap->epoch + 1 == epoch) { 3791 dout("applying incremental map %u len %d\n", 3792 epoch, maplen); 3793 err = handle_one_map(osdc, p, p + maplen, true, 3794 &need_resend, &need_resend_linger); 3795 if (err) 3796 goto bad; 3797 handled_incremental = true; 3798 } else { 3799 dout("ignoring incremental map %u len %d\n", 3800 epoch, maplen); 3801 } 3802 p += maplen; 3803 nr_maps--; 3804 } 3805 if (handled_incremental) 3806 goto done; 3807 3808 /* full maps */ 3809 ceph_decode_32_safe(&p, end, nr_maps, bad); 3810 dout(" %d full maps\n", nr_maps); 3811 while (nr_maps) { 3812 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 3813 epoch = ceph_decode_32(&p); 3814 maplen = ceph_decode_32(&p); 3815 ceph_decode_need(&p, end, maplen, bad); 3816 if (nr_maps > 1) { 3817 dout("skipping non-latest full map %u len %d\n", 3818 epoch, maplen); 3819 } else if (osdc->osdmap->epoch >= epoch) { 3820 dout("skipping full map %u len %d, " 3821 "older than our %u\n", epoch, maplen, 3822 osdc->osdmap->epoch); 3823 } else { 3824 dout("taking full map %u len %d\n", epoch, maplen); 3825 err = handle_one_map(osdc, p, p + maplen, false, 3826 &need_resend, &need_resend_linger); 3827 if (err) 3828 goto bad; 3829 } 3830 p += maplen; 3831 nr_maps--; 3832 } 3833 3834 done: 3835 /* 3836 * subscribe to subsequent osdmap updates if full to ensure 3837 * we find out when we are no longer full and stop returning 3838 * ENOSPC. 3839 */ 3840 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 3841 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 3842 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 3843 have_pool_full(osdc); 3844 if (was_pauserd || was_pausewr || pauserd || pausewr || 3845 osdc->osdmap->epoch < osdc->epoch_barrier) 3846 maybe_request_map(osdc); 3847 3848 kick_requests(osdc, &need_resend, &need_resend_linger); 3849 3850 ceph_osdc_abort_on_full(osdc); 3851 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP, 3852 osdc->osdmap->epoch); 3853 up_write(&osdc->lock); 3854 wake_up_all(&osdc->client->auth_wq); 3855 return; 3856 3857 bad: 3858 pr_err("osdc handle_map corrupt msg\n"); 3859 ceph_msg_dump(msg); 3860 up_write(&osdc->lock); 3861 } 3862 3863 /* 3864 * Resubmit requests pending on the given osd. 3865 */ 3866 static void kick_osd_requests(struct ceph_osd *osd) 3867 { 3868 struct rb_node *n; 3869 3870 clear_backoffs(osd); 3871 3872 for (n = rb_first(&osd->o_requests); n; ) { 3873 struct ceph_osd_request *req = 3874 rb_entry(n, struct ceph_osd_request, r_node); 3875 3876 n = rb_next(n); /* cancel_linger_request() */ 3877 3878 if (!req->r_linger) { 3879 if (!req->r_t.paused) 3880 send_request(req); 3881 } else { 3882 cancel_linger_request(req); 3883 } 3884 } 3885 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) { 3886 struct ceph_osd_linger_request *lreq = 3887 rb_entry(n, struct ceph_osd_linger_request, node); 3888 3889 send_linger(lreq); 3890 } 3891 } 3892 3893 /* 3894 * If the osd connection drops, we need to resubmit all requests. 3895 */ 3896 static void osd_fault(struct ceph_connection *con) 3897 { 3898 struct ceph_osd *osd = con->private; 3899 struct ceph_osd_client *osdc = osd->o_osdc; 3900 3901 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 3902 3903 down_write(&osdc->lock); 3904 if (!osd_registered(osd)) { 3905 dout("%s osd%d unknown\n", __func__, osd->o_osd); 3906 goto out_unlock; 3907 } 3908 3909 if (!reopen_osd(osd)) 3910 kick_osd_requests(osd); 3911 maybe_request_map(osdc); 3912 3913 out_unlock: 3914 up_write(&osdc->lock); 3915 } 3916 3917 struct MOSDBackoff { 3918 struct ceph_spg spgid; 3919 u32 map_epoch; 3920 u8 op; 3921 u64 id; 3922 struct ceph_hobject_id *begin; 3923 struct ceph_hobject_id *end; 3924 }; 3925 3926 static int decode_MOSDBackoff(const struct ceph_msg *msg, struct MOSDBackoff *m) 3927 { 3928 void *p = msg->front.iov_base; 3929 void *const end = p + msg->front.iov_len; 3930 u8 struct_v; 3931 u32 struct_len; 3932 int ret; 3933 3934 ret = ceph_start_decoding(&p, end, 1, "spg_t", &struct_v, &struct_len); 3935 if (ret) 3936 return ret; 3937 3938 ret = ceph_decode_pgid(&p, end, &m->spgid.pgid); 3939 if (ret) 3940 return ret; 3941 3942 ceph_decode_8_safe(&p, end, m->spgid.shard, e_inval); 3943 ceph_decode_32_safe(&p, end, m->map_epoch, e_inval); 3944 ceph_decode_8_safe(&p, end, m->op, e_inval); 3945 ceph_decode_64_safe(&p, end, m->id, e_inval); 3946 3947 m->begin = kzalloc(sizeof(*m->begin), GFP_NOIO); 3948 if (!m->begin) 3949 return -ENOMEM; 3950 3951 ret = decode_hoid(&p, end, m->begin); 3952 if (ret) { 3953 free_hoid(m->begin); 3954 return ret; 3955 } 3956 3957 m->end = kzalloc(sizeof(*m->end), GFP_NOIO); 3958 if (!m->end) { 3959 free_hoid(m->begin); 3960 return -ENOMEM; 3961 } 3962 3963 ret = decode_hoid(&p, end, m->end); 3964 if (ret) { 3965 free_hoid(m->begin); 3966 free_hoid(m->end); 3967 return ret; 3968 } 3969 3970 return 0; 3971 3972 e_inval: 3973 return -EINVAL; 3974 } 3975 3976 static struct ceph_msg *create_backoff_message( 3977 const struct ceph_osd_backoff *backoff, 3978 u32 map_epoch) 3979 { 3980 struct ceph_msg *msg; 3981 void *p, *end; 3982 int msg_size; 3983 3984 msg_size = CEPH_ENCODING_START_BLK_LEN + 3985 CEPH_PGID_ENCODING_LEN + 1; /* spgid */ 3986 msg_size += 4 + 1 + 8; /* map_epoch, op, id */ 3987 msg_size += CEPH_ENCODING_START_BLK_LEN + 3988 hoid_encoding_size(backoff->begin); 3989 msg_size += CEPH_ENCODING_START_BLK_LEN + 3990 hoid_encoding_size(backoff->end); 3991 3992 msg = ceph_msg_new(CEPH_MSG_OSD_BACKOFF, msg_size, GFP_NOIO, true); 3993 if (!msg) 3994 return NULL; 3995 3996 p = msg->front.iov_base; 3997 end = p + msg->front_alloc_len; 3998 3999 encode_spgid(&p, &backoff->spgid); 4000 ceph_encode_32(&p, map_epoch); 4001 ceph_encode_8(&p, CEPH_OSD_BACKOFF_OP_ACK_BLOCK); 4002 ceph_encode_64(&p, backoff->id); 4003 encode_hoid(&p, end, backoff->begin); 4004 encode_hoid(&p, end, backoff->end); 4005 BUG_ON(p != end); 4006 4007 msg->front.iov_len = p - msg->front.iov_base; 4008 msg->hdr.version = cpu_to_le16(1); /* MOSDBackoff v1 */ 4009 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); 4010 4011 return msg; 4012 } 4013 4014 static void handle_backoff_block(struct ceph_osd *osd, struct MOSDBackoff *m) 4015 { 4016 struct ceph_spg_mapping *spg; 4017 struct ceph_osd_backoff *backoff; 4018 struct ceph_msg *msg; 4019 4020 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd, 4021 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id); 4022 4023 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &m->spgid); 4024 if (!spg) { 4025 spg = alloc_spg_mapping(); 4026 if (!spg) { 4027 pr_err("%s failed to allocate spg\n", __func__); 4028 return; 4029 } 4030 spg->spgid = m->spgid; /* struct */ 4031 insert_spg_mapping(&osd->o_backoff_mappings, spg); 4032 } 4033 4034 backoff = alloc_backoff(); 4035 if (!backoff) { 4036 pr_err("%s failed to allocate backoff\n", __func__); 4037 return; 4038 } 4039 backoff->spgid = m->spgid; /* struct */ 4040 backoff->id = m->id; 4041 backoff->begin = m->begin; 4042 m->begin = NULL; /* backoff now owns this */ 4043 backoff->end = m->end; 4044 m->end = NULL; /* ditto */ 4045 4046 insert_backoff(&spg->backoffs, backoff); 4047 insert_backoff_by_id(&osd->o_backoffs_by_id, backoff); 4048 4049 /* 4050 * Ack with original backoff's epoch so that the OSD can 4051 * discard this if there was a PG split. 4052 */ 4053 msg = create_backoff_message(backoff, m->map_epoch); 4054 if (!msg) { 4055 pr_err("%s failed to allocate msg\n", __func__); 4056 return; 4057 } 4058 ceph_con_send(&osd->o_con, msg); 4059 } 4060 4061 static bool target_contained_by(const struct ceph_osd_request_target *t, 4062 const struct ceph_hobject_id *begin, 4063 const struct ceph_hobject_id *end) 4064 { 4065 struct ceph_hobject_id hoid; 4066 int cmp; 4067 4068 hoid_fill_from_target(&hoid, t); 4069 cmp = hoid_compare(&hoid, begin); 4070 return !cmp || (cmp > 0 && hoid_compare(&hoid, end) < 0); 4071 } 4072 4073 static void handle_backoff_unblock(struct ceph_osd *osd, 4074 const struct MOSDBackoff *m) 4075 { 4076 struct ceph_spg_mapping *spg; 4077 struct ceph_osd_backoff *backoff; 4078 struct rb_node *n; 4079 4080 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd, 4081 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id); 4082 4083 backoff = lookup_backoff_by_id(&osd->o_backoffs_by_id, m->id); 4084 if (!backoff) { 4085 pr_err("%s osd%d spgid %llu.%xs%d id %llu backoff dne\n", 4086 __func__, osd->o_osd, m->spgid.pgid.pool, 4087 m->spgid.pgid.seed, m->spgid.shard, m->id); 4088 return; 4089 } 4090 4091 if (hoid_compare(backoff->begin, m->begin) && 4092 hoid_compare(backoff->end, m->end)) { 4093 pr_err("%s osd%d spgid %llu.%xs%d id %llu bad range?\n", 4094 __func__, osd->o_osd, m->spgid.pgid.pool, 4095 m->spgid.pgid.seed, m->spgid.shard, m->id); 4096 /* unblock it anyway... */ 4097 } 4098 4099 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &backoff->spgid); 4100 BUG_ON(!spg); 4101 4102 erase_backoff(&spg->backoffs, backoff); 4103 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff); 4104 free_backoff(backoff); 4105 4106 if (RB_EMPTY_ROOT(&spg->backoffs)) { 4107 erase_spg_mapping(&osd->o_backoff_mappings, spg); 4108 free_spg_mapping(spg); 4109 } 4110 4111 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) { 4112 struct ceph_osd_request *req = 4113 rb_entry(n, struct ceph_osd_request, r_node); 4114 4115 if (!ceph_spg_compare(&req->r_t.spgid, &m->spgid)) { 4116 /* 4117 * Match against @m, not @backoff -- the PG may 4118 * have split on the OSD. 4119 */ 4120 if (target_contained_by(&req->r_t, m->begin, m->end)) { 4121 /* 4122 * If no other installed backoff applies, 4123 * resend. 4124 */ 4125 send_request(req); 4126 } 4127 } 4128 } 4129 } 4130 4131 static void handle_backoff(struct ceph_osd *osd, struct ceph_msg *msg) 4132 { 4133 struct ceph_osd_client *osdc = osd->o_osdc; 4134 struct MOSDBackoff m; 4135 int ret; 4136 4137 down_read(&osdc->lock); 4138 if (!osd_registered(osd)) { 4139 dout("%s osd%d unknown\n", __func__, osd->o_osd); 4140 up_read(&osdc->lock); 4141 return; 4142 } 4143 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num)); 4144 4145 mutex_lock(&osd->lock); 4146 ret = decode_MOSDBackoff(msg, &m); 4147 if (ret) { 4148 pr_err("failed to decode MOSDBackoff: %d\n", ret); 4149 ceph_msg_dump(msg); 4150 goto out_unlock; 4151 } 4152 4153 switch (m.op) { 4154 case CEPH_OSD_BACKOFF_OP_BLOCK: 4155 handle_backoff_block(osd, &m); 4156 break; 4157 case CEPH_OSD_BACKOFF_OP_UNBLOCK: 4158 handle_backoff_unblock(osd, &m); 4159 break; 4160 default: 4161 pr_err("%s osd%d unknown op %d\n", __func__, osd->o_osd, m.op); 4162 } 4163 4164 free_hoid(m.begin); 4165 free_hoid(m.end); 4166 4167 out_unlock: 4168 mutex_unlock(&osd->lock); 4169 up_read(&osdc->lock); 4170 } 4171 4172 /* 4173 * Process osd watch notifications 4174 */ 4175 static void handle_watch_notify(struct ceph_osd_client *osdc, 4176 struct ceph_msg *msg) 4177 { 4178 void *p = msg->front.iov_base; 4179 void *const end = p + msg->front.iov_len; 4180 struct ceph_osd_linger_request *lreq; 4181 struct linger_work *lwork; 4182 u8 proto_ver, opcode; 4183 u64 cookie, notify_id; 4184 u64 notifier_id = 0; 4185 s32 return_code = 0; 4186 void *payload = NULL; 4187 u32 payload_len = 0; 4188 4189 ceph_decode_8_safe(&p, end, proto_ver, bad); 4190 ceph_decode_8_safe(&p, end, opcode, bad); 4191 ceph_decode_64_safe(&p, end, cookie, bad); 4192 p += 8; /* skip ver */ 4193 ceph_decode_64_safe(&p, end, notify_id, bad); 4194 4195 if (proto_ver >= 1) { 4196 ceph_decode_32_safe(&p, end, payload_len, bad); 4197 ceph_decode_need(&p, end, payload_len, bad); 4198 payload = p; 4199 p += payload_len; 4200 } 4201 4202 if (le16_to_cpu(msg->hdr.version) >= 2) 4203 ceph_decode_32_safe(&p, end, return_code, bad); 4204 4205 if (le16_to_cpu(msg->hdr.version) >= 3) 4206 ceph_decode_64_safe(&p, end, notifier_id, bad); 4207 4208 down_read(&osdc->lock); 4209 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie); 4210 if (!lreq) { 4211 dout("%s opcode %d cookie %llu dne\n", __func__, opcode, 4212 cookie); 4213 goto out_unlock_osdc; 4214 } 4215 4216 mutex_lock(&lreq->lock); 4217 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__, 4218 opcode, cookie, lreq, lreq->is_watch); 4219 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) { 4220 if (!lreq->last_error) { 4221 lreq->last_error = -ENOTCONN; 4222 queue_watch_error(lreq); 4223 } 4224 } else if (!lreq->is_watch) { 4225 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */ 4226 if (lreq->notify_id && lreq->notify_id != notify_id) { 4227 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq, 4228 lreq->notify_id, notify_id); 4229 } else if (!completion_done(&lreq->notify_finish_wait)) { 4230 struct ceph_msg_data *data = 4231 list_first_entry_or_null(&msg->data, 4232 struct ceph_msg_data, 4233 links); 4234 4235 if (data) { 4236 if (lreq->preply_pages) { 4237 WARN_ON(data->type != 4238 CEPH_MSG_DATA_PAGES); 4239 *lreq->preply_pages = data->pages; 4240 *lreq->preply_len = data->length; 4241 } else { 4242 ceph_release_page_vector(data->pages, 4243 calc_pages_for(0, data->length)); 4244 } 4245 } 4246 lreq->notify_finish_error = return_code; 4247 complete_all(&lreq->notify_finish_wait); 4248 } 4249 } else { 4250 /* CEPH_WATCH_EVENT_NOTIFY */ 4251 lwork = lwork_alloc(lreq, do_watch_notify); 4252 if (!lwork) { 4253 pr_err("failed to allocate notify-lwork\n"); 4254 goto out_unlock_lreq; 4255 } 4256 4257 lwork->notify.notify_id = notify_id; 4258 lwork->notify.notifier_id = notifier_id; 4259 lwork->notify.payload = payload; 4260 lwork->notify.payload_len = payload_len; 4261 lwork->notify.msg = ceph_msg_get(msg); 4262 lwork_queue(lwork); 4263 } 4264 4265 out_unlock_lreq: 4266 mutex_unlock(&lreq->lock); 4267 out_unlock_osdc: 4268 up_read(&osdc->lock); 4269 return; 4270 4271 bad: 4272 pr_err("osdc handle_watch_notify corrupt msg\n"); 4273 } 4274 4275 /* 4276 * Register request, send initial attempt. 4277 */ 4278 int ceph_osdc_start_request(struct ceph_osd_client *osdc, 4279 struct ceph_osd_request *req, 4280 bool nofail) 4281 { 4282 down_read(&osdc->lock); 4283 submit_request(req, false); 4284 up_read(&osdc->lock); 4285 4286 return 0; 4287 } 4288 EXPORT_SYMBOL(ceph_osdc_start_request); 4289 4290 /* 4291 * Unregister a registered request. The request is not completed: 4292 * ->r_result isn't set and __complete_request() isn't called. 4293 */ 4294 void ceph_osdc_cancel_request(struct ceph_osd_request *req) 4295 { 4296 struct ceph_osd_client *osdc = req->r_osdc; 4297 4298 down_write(&osdc->lock); 4299 if (req->r_osd) 4300 cancel_request(req); 4301 up_write(&osdc->lock); 4302 } 4303 EXPORT_SYMBOL(ceph_osdc_cancel_request); 4304 4305 /* 4306 * @timeout: in jiffies, 0 means "wait forever" 4307 */ 4308 static int wait_request_timeout(struct ceph_osd_request *req, 4309 unsigned long timeout) 4310 { 4311 long left; 4312 4313 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 4314 left = wait_for_completion_killable_timeout(&req->r_completion, 4315 ceph_timeout_jiffies(timeout)); 4316 if (left <= 0) { 4317 left = left ?: -ETIMEDOUT; 4318 ceph_osdc_cancel_request(req); 4319 } else { 4320 left = req->r_result; /* completed */ 4321 } 4322 4323 return left; 4324 } 4325 4326 /* 4327 * wait for a request to complete 4328 */ 4329 int ceph_osdc_wait_request(struct ceph_osd_client *osdc, 4330 struct ceph_osd_request *req) 4331 { 4332 return wait_request_timeout(req, 0); 4333 } 4334 EXPORT_SYMBOL(ceph_osdc_wait_request); 4335 4336 /* 4337 * sync - wait for all in-flight requests to flush. avoid starvation. 4338 */ 4339 void ceph_osdc_sync(struct ceph_osd_client *osdc) 4340 { 4341 struct rb_node *n, *p; 4342 u64 last_tid = atomic64_read(&osdc->last_tid); 4343 4344 again: 4345 down_read(&osdc->lock); 4346 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 4347 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 4348 4349 mutex_lock(&osd->lock); 4350 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) { 4351 struct ceph_osd_request *req = 4352 rb_entry(p, struct ceph_osd_request, r_node); 4353 4354 if (req->r_tid > last_tid) 4355 break; 4356 4357 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE)) 4358 continue; 4359 4360 ceph_osdc_get_request(req); 4361 mutex_unlock(&osd->lock); 4362 up_read(&osdc->lock); 4363 dout("%s waiting on req %p tid %llu last_tid %llu\n", 4364 __func__, req, req->r_tid, last_tid); 4365 wait_for_completion(&req->r_completion); 4366 ceph_osdc_put_request(req); 4367 goto again; 4368 } 4369 4370 mutex_unlock(&osd->lock); 4371 } 4372 4373 up_read(&osdc->lock); 4374 dout("%s done last_tid %llu\n", __func__, last_tid); 4375 } 4376 EXPORT_SYMBOL(ceph_osdc_sync); 4377 4378 static struct ceph_osd_request * 4379 alloc_linger_request(struct ceph_osd_linger_request *lreq) 4380 { 4381 struct ceph_osd_request *req; 4382 4383 req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO); 4384 if (!req) 4385 return NULL; 4386 4387 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 4388 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 4389 4390 if (ceph_osdc_alloc_messages(req, GFP_NOIO)) { 4391 ceph_osdc_put_request(req); 4392 return NULL; 4393 } 4394 4395 return req; 4396 } 4397 4398 /* 4399 * Returns a handle, caller owns a ref. 4400 */ 4401 struct ceph_osd_linger_request * 4402 ceph_osdc_watch(struct ceph_osd_client *osdc, 4403 struct ceph_object_id *oid, 4404 struct ceph_object_locator *oloc, 4405 rados_watchcb2_t wcb, 4406 rados_watcherrcb_t errcb, 4407 void *data) 4408 { 4409 struct ceph_osd_linger_request *lreq; 4410 int ret; 4411 4412 lreq = linger_alloc(osdc); 4413 if (!lreq) 4414 return ERR_PTR(-ENOMEM); 4415 4416 lreq->is_watch = true; 4417 lreq->wcb = wcb; 4418 lreq->errcb = errcb; 4419 lreq->data = data; 4420 lreq->watch_valid_thru = jiffies; 4421 4422 ceph_oid_copy(&lreq->t.base_oid, oid); 4423 ceph_oloc_copy(&lreq->t.base_oloc, oloc); 4424 lreq->t.flags = CEPH_OSD_FLAG_WRITE; 4425 ktime_get_real_ts(&lreq->mtime); 4426 4427 lreq->reg_req = alloc_linger_request(lreq); 4428 if (!lreq->reg_req) { 4429 ret = -ENOMEM; 4430 goto err_put_lreq; 4431 } 4432 4433 lreq->ping_req = alloc_linger_request(lreq); 4434 if (!lreq->ping_req) { 4435 ret = -ENOMEM; 4436 goto err_put_lreq; 4437 } 4438 4439 down_write(&osdc->lock); 4440 linger_register(lreq); /* before osd_req_op_* */ 4441 osd_req_op_watch_init(lreq->reg_req, 0, lreq->linger_id, 4442 CEPH_OSD_WATCH_OP_WATCH); 4443 osd_req_op_watch_init(lreq->ping_req, 0, lreq->linger_id, 4444 CEPH_OSD_WATCH_OP_PING); 4445 linger_submit(lreq); 4446 up_write(&osdc->lock); 4447 4448 ret = linger_reg_commit_wait(lreq); 4449 if (ret) { 4450 linger_cancel(lreq); 4451 goto err_put_lreq; 4452 } 4453 4454 return lreq; 4455 4456 err_put_lreq: 4457 linger_put(lreq); 4458 return ERR_PTR(ret); 4459 } 4460 EXPORT_SYMBOL(ceph_osdc_watch); 4461 4462 /* 4463 * Releases a ref. 4464 * 4465 * Times out after mount_timeout to preserve rbd unmap behaviour 4466 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap 4467 * with mount_timeout"). 4468 */ 4469 int ceph_osdc_unwatch(struct ceph_osd_client *osdc, 4470 struct ceph_osd_linger_request *lreq) 4471 { 4472 struct ceph_options *opts = osdc->client->options; 4473 struct ceph_osd_request *req; 4474 int ret; 4475 4476 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 4477 if (!req) 4478 return -ENOMEM; 4479 4480 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 4481 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 4482 req->r_flags = CEPH_OSD_FLAG_WRITE; 4483 ktime_get_real_ts(&req->r_mtime); 4484 osd_req_op_watch_init(req, 0, lreq->linger_id, 4485 CEPH_OSD_WATCH_OP_UNWATCH); 4486 4487 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 4488 if (ret) 4489 goto out_put_req; 4490 4491 ceph_osdc_start_request(osdc, req, false); 4492 linger_cancel(lreq); 4493 linger_put(lreq); 4494 ret = wait_request_timeout(req, opts->mount_timeout); 4495 4496 out_put_req: 4497 ceph_osdc_put_request(req); 4498 return ret; 4499 } 4500 EXPORT_SYMBOL(ceph_osdc_unwatch); 4501 4502 static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which, 4503 u64 notify_id, u64 cookie, void *payload, 4504 size_t payload_len) 4505 { 4506 struct ceph_osd_req_op *op; 4507 struct ceph_pagelist *pl; 4508 int ret; 4509 4510 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0); 4511 4512 pl = kmalloc(sizeof(*pl), GFP_NOIO); 4513 if (!pl) 4514 return -ENOMEM; 4515 4516 ceph_pagelist_init(pl); 4517 ret = ceph_pagelist_encode_64(pl, notify_id); 4518 ret |= ceph_pagelist_encode_64(pl, cookie); 4519 if (payload) { 4520 ret |= ceph_pagelist_encode_32(pl, payload_len); 4521 ret |= ceph_pagelist_append(pl, payload, payload_len); 4522 } else { 4523 ret |= ceph_pagelist_encode_32(pl, 0); 4524 } 4525 if (ret) { 4526 ceph_pagelist_release(pl); 4527 return -ENOMEM; 4528 } 4529 4530 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl); 4531 op->indata_len = pl->length; 4532 return 0; 4533 } 4534 4535 int ceph_osdc_notify_ack(struct ceph_osd_client *osdc, 4536 struct ceph_object_id *oid, 4537 struct ceph_object_locator *oloc, 4538 u64 notify_id, 4539 u64 cookie, 4540 void *payload, 4541 size_t payload_len) 4542 { 4543 struct ceph_osd_request *req; 4544 int ret; 4545 4546 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 4547 if (!req) 4548 return -ENOMEM; 4549 4550 ceph_oid_copy(&req->r_base_oid, oid); 4551 ceph_oloc_copy(&req->r_base_oloc, oloc); 4552 req->r_flags = CEPH_OSD_FLAG_READ; 4553 4554 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 4555 if (ret) 4556 goto out_put_req; 4557 4558 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload, 4559 payload_len); 4560 if (ret) 4561 goto out_put_req; 4562 4563 ceph_osdc_start_request(osdc, req, false); 4564 ret = ceph_osdc_wait_request(osdc, req); 4565 4566 out_put_req: 4567 ceph_osdc_put_request(req); 4568 return ret; 4569 } 4570 EXPORT_SYMBOL(ceph_osdc_notify_ack); 4571 4572 static int osd_req_op_notify_init(struct ceph_osd_request *req, int which, 4573 u64 cookie, u32 prot_ver, u32 timeout, 4574 void *payload, size_t payload_len) 4575 { 4576 struct ceph_osd_req_op *op; 4577 struct ceph_pagelist *pl; 4578 int ret; 4579 4580 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0); 4581 op->notify.cookie = cookie; 4582 4583 pl = kmalloc(sizeof(*pl), GFP_NOIO); 4584 if (!pl) 4585 return -ENOMEM; 4586 4587 ceph_pagelist_init(pl); 4588 ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */ 4589 ret |= ceph_pagelist_encode_32(pl, timeout); 4590 ret |= ceph_pagelist_encode_32(pl, payload_len); 4591 ret |= ceph_pagelist_append(pl, payload, payload_len); 4592 if (ret) { 4593 ceph_pagelist_release(pl); 4594 return -ENOMEM; 4595 } 4596 4597 ceph_osd_data_pagelist_init(&op->notify.request_data, pl); 4598 op->indata_len = pl->length; 4599 return 0; 4600 } 4601 4602 /* 4603 * @timeout: in seconds 4604 * 4605 * @preply_{pages,len} are initialized both on success and error. 4606 * The caller is responsible for: 4607 * 4608 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len)) 4609 */ 4610 int ceph_osdc_notify(struct ceph_osd_client *osdc, 4611 struct ceph_object_id *oid, 4612 struct ceph_object_locator *oloc, 4613 void *payload, 4614 size_t payload_len, 4615 u32 timeout, 4616 struct page ***preply_pages, 4617 size_t *preply_len) 4618 { 4619 struct ceph_osd_linger_request *lreq; 4620 struct page **pages; 4621 int ret; 4622 4623 WARN_ON(!timeout); 4624 if (preply_pages) { 4625 *preply_pages = NULL; 4626 *preply_len = 0; 4627 } 4628 4629 lreq = linger_alloc(osdc); 4630 if (!lreq) 4631 return -ENOMEM; 4632 4633 lreq->preply_pages = preply_pages; 4634 lreq->preply_len = preply_len; 4635 4636 ceph_oid_copy(&lreq->t.base_oid, oid); 4637 ceph_oloc_copy(&lreq->t.base_oloc, oloc); 4638 lreq->t.flags = CEPH_OSD_FLAG_READ; 4639 4640 lreq->reg_req = alloc_linger_request(lreq); 4641 if (!lreq->reg_req) { 4642 ret = -ENOMEM; 4643 goto out_put_lreq; 4644 } 4645 4646 /* for notify_id */ 4647 pages = ceph_alloc_page_vector(1, GFP_NOIO); 4648 if (IS_ERR(pages)) { 4649 ret = PTR_ERR(pages); 4650 goto out_put_lreq; 4651 } 4652 4653 down_write(&osdc->lock); 4654 linger_register(lreq); /* before osd_req_op_* */ 4655 ret = osd_req_op_notify_init(lreq->reg_req, 0, lreq->linger_id, 1, 4656 timeout, payload, payload_len); 4657 if (ret) { 4658 linger_unregister(lreq); 4659 up_write(&osdc->lock); 4660 ceph_release_page_vector(pages, 1); 4661 goto out_put_lreq; 4662 } 4663 ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify, 4664 response_data), 4665 pages, PAGE_SIZE, 0, false, true); 4666 linger_submit(lreq); 4667 up_write(&osdc->lock); 4668 4669 ret = linger_reg_commit_wait(lreq); 4670 if (!ret) 4671 ret = linger_notify_finish_wait(lreq); 4672 else 4673 dout("lreq %p failed to initiate notify %d\n", lreq, ret); 4674 4675 linger_cancel(lreq); 4676 out_put_lreq: 4677 linger_put(lreq); 4678 return ret; 4679 } 4680 EXPORT_SYMBOL(ceph_osdc_notify); 4681 4682 /* 4683 * Return the number of milliseconds since the watch was last 4684 * confirmed, or an error. If there is an error, the watch is no 4685 * longer valid, and should be destroyed with ceph_osdc_unwatch(). 4686 */ 4687 int ceph_osdc_watch_check(struct ceph_osd_client *osdc, 4688 struct ceph_osd_linger_request *lreq) 4689 { 4690 unsigned long stamp, age; 4691 int ret; 4692 4693 down_read(&osdc->lock); 4694 mutex_lock(&lreq->lock); 4695 stamp = lreq->watch_valid_thru; 4696 if (!list_empty(&lreq->pending_lworks)) { 4697 struct linger_work *lwork = 4698 list_first_entry(&lreq->pending_lworks, 4699 struct linger_work, 4700 pending_item); 4701 4702 if (time_before(lwork->queued_stamp, stamp)) 4703 stamp = lwork->queued_stamp; 4704 } 4705 age = jiffies - stamp; 4706 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__, 4707 lreq, lreq->linger_id, age, lreq->last_error); 4708 /* we are truncating to msecs, so return a safe upper bound */ 4709 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age); 4710 4711 mutex_unlock(&lreq->lock); 4712 up_read(&osdc->lock); 4713 return ret; 4714 } 4715 4716 static int decode_watcher(void **p, void *end, struct ceph_watch_item *item) 4717 { 4718 u8 struct_v; 4719 u32 struct_len; 4720 int ret; 4721 4722 ret = ceph_start_decoding(p, end, 2, "watch_item_t", 4723 &struct_v, &struct_len); 4724 if (ret) 4725 return ret; 4726 4727 ceph_decode_copy(p, &item->name, sizeof(item->name)); 4728 item->cookie = ceph_decode_64(p); 4729 *p += 4; /* skip timeout_seconds */ 4730 if (struct_v >= 2) { 4731 ceph_decode_copy(p, &item->addr, sizeof(item->addr)); 4732 ceph_decode_addr(&item->addr); 4733 } 4734 4735 dout("%s %s%llu cookie %llu addr %s\n", __func__, 4736 ENTITY_NAME(item->name), item->cookie, 4737 ceph_pr_addr(&item->addr.in_addr)); 4738 return 0; 4739 } 4740 4741 static int decode_watchers(void **p, void *end, 4742 struct ceph_watch_item **watchers, 4743 u32 *num_watchers) 4744 { 4745 u8 struct_v; 4746 u32 struct_len; 4747 int i; 4748 int ret; 4749 4750 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t", 4751 &struct_v, &struct_len); 4752 if (ret) 4753 return ret; 4754 4755 *num_watchers = ceph_decode_32(p); 4756 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO); 4757 if (!*watchers) 4758 return -ENOMEM; 4759 4760 for (i = 0; i < *num_watchers; i++) { 4761 ret = decode_watcher(p, end, *watchers + i); 4762 if (ret) { 4763 kfree(*watchers); 4764 return ret; 4765 } 4766 } 4767 4768 return 0; 4769 } 4770 4771 /* 4772 * On success, the caller is responsible for: 4773 * 4774 * kfree(watchers); 4775 */ 4776 int ceph_osdc_list_watchers(struct ceph_osd_client *osdc, 4777 struct ceph_object_id *oid, 4778 struct ceph_object_locator *oloc, 4779 struct ceph_watch_item **watchers, 4780 u32 *num_watchers) 4781 { 4782 struct ceph_osd_request *req; 4783 struct page **pages; 4784 int ret; 4785 4786 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 4787 if (!req) 4788 return -ENOMEM; 4789 4790 ceph_oid_copy(&req->r_base_oid, oid); 4791 ceph_oloc_copy(&req->r_base_oloc, oloc); 4792 req->r_flags = CEPH_OSD_FLAG_READ; 4793 4794 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 4795 if (ret) 4796 goto out_put_req; 4797 4798 pages = ceph_alloc_page_vector(1, GFP_NOIO); 4799 if (IS_ERR(pages)) { 4800 ret = PTR_ERR(pages); 4801 goto out_put_req; 4802 } 4803 4804 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0); 4805 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers, 4806 response_data), 4807 pages, PAGE_SIZE, 0, false, true); 4808 4809 ceph_osdc_start_request(osdc, req, false); 4810 ret = ceph_osdc_wait_request(osdc, req); 4811 if (ret >= 0) { 4812 void *p = page_address(pages[0]); 4813 void *const end = p + req->r_ops[0].outdata_len; 4814 4815 ret = decode_watchers(&p, end, watchers, num_watchers); 4816 } 4817 4818 out_put_req: 4819 ceph_osdc_put_request(req); 4820 return ret; 4821 } 4822 EXPORT_SYMBOL(ceph_osdc_list_watchers); 4823 4824 /* 4825 * Call all pending notify callbacks - for use after a watch is 4826 * unregistered, to make sure no more callbacks for it will be invoked 4827 */ 4828 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc) 4829 { 4830 dout("%s osdc %p\n", __func__, osdc); 4831 flush_workqueue(osdc->notify_wq); 4832 } 4833 EXPORT_SYMBOL(ceph_osdc_flush_notifies); 4834 4835 void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc) 4836 { 4837 down_read(&osdc->lock); 4838 maybe_request_map(osdc); 4839 up_read(&osdc->lock); 4840 } 4841 EXPORT_SYMBOL(ceph_osdc_maybe_request_map); 4842 4843 /* 4844 * Execute an OSD class method on an object. 4845 * 4846 * @flags: CEPH_OSD_FLAG_* 4847 * @resp_len: in/out param for reply length 4848 */ 4849 int ceph_osdc_call(struct ceph_osd_client *osdc, 4850 struct ceph_object_id *oid, 4851 struct ceph_object_locator *oloc, 4852 const char *class, const char *method, 4853 unsigned int flags, 4854 struct page *req_page, size_t req_len, 4855 struct page *resp_page, size_t *resp_len) 4856 { 4857 struct ceph_osd_request *req; 4858 int ret; 4859 4860 if (req_len > PAGE_SIZE || (resp_page && *resp_len > PAGE_SIZE)) 4861 return -E2BIG; 4862 4863 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 4864 if (!req) 4865 return -ENOMEM; 4866 4867 ceph_oid_copy(&req->r_base_oid, oid); 4868 ceph_oloc_copy(&req->r_base_oloc, oloc); 4869 req->r_flags = flags; 4870 4871 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 4872 if (ret) 4873 goto out_put_req; 4874 4875 osd_req_op_cls_init(req, 0, CEPH_OSD_OP_CALL, class, method); 4876 if (req_page) 4877 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len, 4878 0, false, false); 4879 if (resp_page) 4880 osd_req_op_cls_response_data_pages(req, 0, &resp_page, 4881 *resp_len, 0, false, false); 4882 4883 ceph_osdc_start_request(osdc, req, false); 4884 ret = ceph_osdc_wait_request(osdc, req); 4885 if (ret >= 0) { 4886 ret = req->r_ops[0].rval; 4887 if (resp_page) 4888 *resp_len = req->r_ops[0].outdata_len; 4889 } 4890 4891 out_put_req: 4892 ceph_osdc_put_request(req); 4893 return ret; 4894 } 4895 EXPORT_SYMBOL(ceph_osdc_call); 4896 4897 /* 4898 * init, shutdown 4899 */ 4900 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) 4901 { 4902 int err; 4903 4904 dout("init\n"); 4905 osdc->client = client; 4906 init_rwsem(&osdc->lock); 4907 osdc->osds = RB_ROOT; 4908 INIT_LIST_HEAD(&osdc->osd_lru); 4909 spin_lock_init(&osdc->osd_lru_lock); 4910 osd_init(&osdc->homeless_osd); 4911 osdc->homeless_osd.o_osdc = osdc; 4912 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD; 4913 osdc->last_linger_id = CEPH_LINGER_ID_START; 4914 osdc->linger_requests = RB_ROOT; 4915 osdc->map_checks = RB_ROOT; 4916 osdc->linger_map_checks = RB_ROOT; 4917 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); 4918 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); 4919 4920 err = -ENOMEM; 4921 osdc->osdmap = ceph_osdmap_alloc(); 4922 if (!osdc->osdmap) 4923 goto out; 4924 4925 osdc->req_mempool = mempool_create_slab_pool(10, 4926 ceph_osd_request_cache); 4927 if (!osdc->req_mempool) 4928 goto out_map; 4929 4930 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP, 4931 PAGE_SIZE, 10, true, "osd_op"); 4932 if (err < 0) 4933 goto out_mempool; 4934 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, 4935 PAGE_SIZE, 10, true, "osd_op_reply"); 4936 if (err < 0) 4937 goto out_msgpool; 4938 4939 err = -ENOMEM; 4940 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify"); 4941 if (!osdc->notify_wq) 4942 goto out_msgpool_reply; 4943 4944 schedule_delayed_work(&osdc->timeout_work, 4945 osdc->client->options->osd_keepalive_timeout); 4946 schedule_delayed_work(&osdc->osds_timeout_work, 4947 round_jiffies_relative(osdc->client->options->osd_idle_ttl)); 4948 4949 return 0; 4950 4951 out_msgpool_reply: 4952 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 4953 out_msgpool: 4954 ceph_msgpool_destroy(&osdc->msgpool_op); 4955 out_mempool: 4956 mempool_destroy(osdc->req_mempool); 4957 out_map: 4958 ceph_osdmap_destroy(osdc->osdmap); 4959 out: 4960 return err; 4961 } 4962 4963 void ceph_osdc_stop(struct ceph_osd_client *osdc) 4964 { 4965 flush_workqueue(osdc->notify_wq); 4966 destroy_workqueue(osdc->notify_wq); 4967 cancel_delayed_work_sync(&osdc->timeout_work); 4968 cancel_delayed_work_sync(&osdc->osds_timeout_work); 4969 4970 down_write(&osdc->lock); 4971 while (!RB_EMPTY_ROOT(&osdc->osds)) { 4972 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds), 4973 struct ceph_osd, o_node); 4974 close_osd(osd); 4975 } 4976 up_write(&osdc->lock); 4977 WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1); 4978 osd_cleanup(&osdc->homeless_osd); 4979 4980 WARN_ON(!list_empty(&osdc->osd_lru)); 4981 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests)); 4982 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks)); 4983 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks)); 4984 WARN_ON(atomic_read(&osdc->num_requests)); 4985 WARN_ON(atomic_read(&osdc->num_homeless)); 4986 4987 ceph_osdmap_destroy(osdc->osdmap); 4988 mempool_destroy(osdc->req_mempool); 4989 ceph_msgpool_destroy(&osdc->msgpool_op); 4990 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 4991 } 4992 4993 /* 4994 * Read some contiguous pages. If we cross a stripe boundary, shorten 4995 * *plen. Return number of bytes read, or error. 4996 */ 4997 int ceph_osdc_readpages(struct ceph_osd_client *osdc, 4998 struct ceph_vino vino, struct ceph_file_layout *layout, 4999 u64 off, u64 *plen, 5000 u32 truncate_seq, u64 truncate_size, 5001 struct page **pages, int num_pages, int page_align) 5002 { 5003 struct ceph_osd_request *req; 5004 int rc = 0; 5005 5006 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, 5007 vino.snap, off, *plen); 5008 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1, 5009 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, 5010 NULL, truncate_seq, truncate_size, 5011 false); 5012 if (IS_ERR(req)) 5013 return PTR_ERR(req); 5014 5015 /* it may be a short read due to an object boundary */ 5016 osd_req_op_extent_osd_data_pages(req, 0, 5017 pages, *plen, page_align, false, false); 5018 5019 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n", 5020 off, *plen, *plen, page_align); 5021 5022 rc = ceph_osdc_start_request(osdc, req, false); 5023 if (!rc) 5024 rc = ceph_osdc_wait_request(osdc, req); 5025 5026 ceph_osdc_put_request(req); 5027 dout("readpages result %d\n", rc); 5028 return rc; 5029 } 5030 EXPORT_SYMBOL(ceph_osdc_readpages); 5031 5032 /* 5033 * do a synchronous write on N pages 5034 */ 5035 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, 5036 struct ceph_file_layout *layout, 5037 struct ceph_snap_context *snapc, 5038 u64 off, u64 len, 5039 u32 truncate_seq, u64 truncate_size, 5040 struct timespec *mtime, 5041 struct page **pages, int num_pages) 5042 { 5043 struct ceph_osd_request *req; 5044 int rc = 0; 5045 int page_align = off & ~PAGE_MASK; 5046 5047 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1, 5048 CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE, 5049 snapc, truncate_seq, truncate_size, 5050 true); 5051 if (IS_ERR(req)) 5052 return PTR_ERR(req); 5053 5054 /* it may be a short write due to an object boundary */ 5055 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align, 5056 false, false); 5057 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len); 5058 5059 req->r_mtime = *mtime; 5060 rc = ceph_osdc_start_request(osdc, req, true); 5061 if (!rc) 5062 rc = ceph_osdc_wait_request(osdc, req); 5063 5064 ceph_osdc_put_request(req); 5065 if (rc == 0) 5066 rc = len; 5067 dout("writepages result %d\n", rc); 5068 return rc; 5069 } 5070 EXPORT_SYMBOL(ceph_osdc_writepages); 5071 5072 int ceph_osdc_setup(void) 5073 { 5074 size_t size = sizeof(struct ceph_osd_request) + 5075 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op); 5076 5077 BUG_ON(ceph_osd_request_cache); 5078 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size, 5079 0, 0, NULL); 5080 5081 return ceph_osd_request_cache ? 0 : -ENOMEM; 5082 } 5083 EXPORT_SYMBOL(ceph_osdc_setup); 5084 5085 void ceph_osdc_cleanup(void) 5086 { 5087 BUG_ON(!ceph_osd_request_cache); 5088 kmem_cache_destroy(ceph_osd_request_cache); 5089 ceph_osd_request_cache = NULL; 5090 } 5091 EXPORT_SYMBOL(ceph_osdc_cleanup); 5092 5093 /* 5094 * handle incoming message 5095 */ 5096 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) 5097 { 5098 struct ceph_osd *osd = con->private; 5099 struct ceph_osd_client *osdc = osd->o_osdc; 5100 int type = le16_to_cpu(msg->hdr.type); 5101 5102 switch (type) { 5103 case CEPH_MSG_OSD_MAP: 5104 ceph_osdc_handle_map(osdc, msg); 5105 break; 5106 case CEPH_MSG_OSD_OPREPLY: 5107 handle_reply(osd, msg); 5108 break; 5109 case CEPH_MSG_OSD_BACKOFF: 5110 handle_backoff(osd, msg); 5111 break; 5112 case CEPH_MSG_WATCH_NOTIFY: 5113 handle_watch_notify(osdc, msg); 5114 break; 5115 5116 default: 5117 pr_err("received unknown message type %d %s\n", type, 5118 ceph_msg_type_name(type)); 5119 } 5120 5121 ceph_msg_put(msg); 5122 } 5123 5124 /* 5125 * Lookup and return message for incoming reply. Don't try to do 5126 * anything about a larger than preallocated data portion of the 5127 * message at the moment - for now, just skip the message. 5128 */ 5129 static struct ceph_msg *get_reply(struct ceph_connection *con, 5130 struct ceph_msg_header *hdr, 5131 int *skip) 5132 { 5133 struct ceph_osd *osd = con->private; 5134 struct ceph_osd_client *osdc = osd->o_osdc; 5135 struct ceph_msg *m = NULL; 5136 struct ceph_osd_request *req; 5137 int front_len = le32_to_cpu(hdr->front_len); 5138 int data_len = le32_to_cpu(hdr->data_len); 5139 u64 tid = le64_to_cpu(hdr->tid); 5140 5141 down_read(&osdc->lock); 5142 if (!osd_registered(osd)) { 5143 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd); 5144 *skip = 1; 5145 goto out_unlock_osdc; 5146 } 5147 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num)); 5148 5149 mutex_lock(&osd->lock); 5150 req = lookup_request(&osd->o_requests, tid); 5151 if (!req) { 5152 dout("%s osd%d tid %llu unknown, skipping\n", __func__, 5153 osd->o_osd, tid); 5154 *skip = 1; 5155 goto out_unlock_session; 5156 } 5157 5158 ceph_msg_revoke_incoming(req->r_reply); 5159 5160 if (front_len > req->r_reply->front_alloc_len) { 5161 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n", 5162 __func__, osd->o_osd, req->r_tid, front_len, 5163 req->r_reply->front_alloc_len); 5164 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS, 5165 false); 5166 if (!m) 5167 goto out_unlock_session; 5168 ceph_msg_put(req->r_reply); 5169 req->r_reply = m; 5170 } 5171 5172 if (data_len > req->r_reply->data_length) { 5173 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n", 5174 __func__, osd->o_osd, req->r_tid, data_len, 5175 req->r_reply->data_length); 5176 m = NULL; 5177 *skip = 1; 5178 goto out_unlock_session; 5179 } 5180 5181 m = ceph_msg_get(req->r_reply); 5182 dout("get_reply tid %lld %p\n", tid, m); 5183 5184 out_unlock_session: 5185 mutex_unlock(&osd->lock); 5186 out_unlock_osdc: 5187 up_read(&osdc->lock); 5188 return m; 5189 } 5190 5191 /* 5192 * TODO: switch to a msg-owned pagelist 5193 */ 5194 static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr) 5195 { 5196 struct ceph_msg *m; 5197 int type = le16_to_cpu(hdr->type); 5198 u32 front_len = le32_to_cpu(hdr->front_len); 5199 u32 data_len = le32_to_cpu(hdr->data_len); 5200 5201 m = ceph_msg_new(type, front_len, GFP_NOIO, false); 5202 if (!m) 5203 return NULL; 5204 5205 if (data_len) { 5206 struct page **pages; 5207 struct ceph_osd_data osd_data; 5208 5209 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len), 5210 GFP_NOIO); 5211 if (IS_ERR(pages)) { 5212 ceph_msg_put(m); 5213 return NULL; 5214 } 5215 5216 ceph_osd_data_pages_init(&osd_data, pages, data_len, 0, false, 5217 false); 5218 ceph_osdc_msg_data_add(m, &osd_data); 5219 } 5220 5221 return m; 5222 } 5223 5224 static struct ceph_msg *alloc_msg(struct ceph_connection *con, 5225 struct ceph_msg_header *hdr, 5226 int *skip) 5227 { 5228 struct ceph_osd *osd = con->private; 5229 int type = le16_to_cpu(hdr->type); 5230 5231 *skip = 0; 5232 switch (type) { 5233 case CEPH_MSG_OSD_MAP: 5234 case CEPH_MSG_OSD_BACKOFF: 5235 case CEPH_MSG_WATCH_NOTIFY: 5236 return alloc_msg_with_page_vector(hdr); 5237 case CEPH_MSG_OSD_OPREPLY: 5238 return get_reply(con, hdr, skip); 5239 default: 5240 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__, 5241 osd->o_osd, type); 5242 *skip = 1; 5243 return NULL; 5244 } 5245 } 5246 5247 /* 5248 * Wrappers to refcount containing ceph_osd struct 5249 */ 5250 static struct ceph_connection *get_osd_con(struct ceph_connection *con) 5251 { 5252 struct ceph_osd *osd = con->private; 5253 if (get_osd(osd)) 5254 return con; 5255 return NULL; 5256 } 5257 5258 static void put_osd_con(struct ceph_connection *con) 5259 { 5260 struct ceph_osd *osd = con->private; 5261 put_osd(osd); 5262 } 5263 5264 /* 5265 * authentication 5266 */ 5267 /* 5268 * Note: returned pointer is the address of a structure that's 5269 * managed separately. Caller must *not* attempt to free it. 5270 */ 5271 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con, 5272 int *proto, int force_new) 5273 { 5274 struct ceph_osd *o = con->private; 5275 struct ceph_osd_client *osdc = o->o_osdc; 5276 struct ceph_auth_client *ac = osdc->client->monc.auth; 5277 struct ceph_auth_handshake *auth = &o->o_auth; 5278 5279 if (force_new && auth->authorizer) { 5280 ceph_auth_destroy_authorizer(auth->authorizer); 5281 auth->authorizer = NULL; 5282 } 5283 if (!auth->authorizer) { 5284 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 5285 auth); 5286 if (ret) 5287 return ERR_PTR(ret); 5288 } else { 5289 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 5290 auth); 5291 if (ret) 5292 return ERR_PTR(ret); 5293 } 5294 *proto = ac->protocol; 5295 5296 return auth; 5297 } 5298 5299 5300 static int verify_authorizer_reply(struct ceph_connection *con) 5301 { 5302 struct ceph_osd *o = con->private; 5303 struct ceph_osd_client *osdc = o->o_osdc; 5304 struct ceph_auth_client *ac = osdc->client->monc.auth; 5305 5306 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer); 5307 } 5308 5309 static int invalidate_authorizer(struct ceph_connection *con) 5310 { 5311 struct ceph_osd *o = con->private; 5312 struct ceph_osd_client *osdc = o->o_osdc; 5313 struct ceph_auth_client *ac = osdc->client->monc.auth; 5314 5315 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); 5316 return ceph_monc_validate_auth(&osdc->client->monc); 5317 } 5318 5319 static void osd_reencode_message(struct ceph_msg *msg) 5320 { 5321 int type = le16_to_cpu(msg->hdr.type); 5322 5323 if (type == CEPH_MSG_OSD_OP) 5324 encode_request_finish(msg); 5325 } 5326 5327 static int osd_sign_message(struct ceph_msg *msg) 5328 { 5329 struct ceph_osd *o = msg->con->private; 5330 struct ceph_auth_handshake *auth = &o->o_auth; 5331 5332 return ceph_auth_sign_message(auth, msg); 5333 } 5334 5335 static int osd_check_message_signature(struct ceph_msg *msg) 5336 { 5337 struct ceph_osd *o = msg->con->private; 5338 struct ceph_auth_handshake *auth = &o->o_auth; 5339 5340 return ceph_auth_check_message_signature(auth, msg); 5341 } 5342 5343 static const struct ceph_connection_operations osd_con_ops = { 5344 .get = get_osd_con, 5345 .put = put_osd_con, 5346 .dispatch = dispatch, 5347 .get_authorizer = get_authorizer, 5348 .verify_authorizer_reply = verify_authorizer_reply, 5349 .invalidate_authorizer = invalidate_authorizer, 5350 .alloc_msg = alloc_msg, 5351 .reencode_message = osd_reencode_message, 5352 .sign_message = osd_sign_message, 5353 .check_message_signature = osd_check_message_signature, 5354 .fault = osd_fault, 5355 }; 5356